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Finding the Fourth Proportional to 72,175,430.60, 108,263,145.90 and 21,062,616.20

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Solution

The fourth proportional to 72,175,430.60, 108,263,145.90 and 21,062,616.20 is: 31,593,924.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,175,430.60 : 108,263,145.90 = 21,062,616.20 : x
  2. Step 2: Convert to fraction form
    72,175,430.60/108,263,145.90 = 21,062,616.20/x
  3. Step 3: Cross multiply
    72,175,430.60x = 108,263,145.90 × 21,062,616.20
  4. Step 4: Simplify right side
    72,175,430.60x = 2,280,305,090,696,303.50
  5. Step 5: Solve for x
    x = 2,280,305,090,696,303.50/72,175,430.60
  6. Step 6: Final answer
    x = 31,593,924.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.