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Finding the Fourth Proportional to 72,908.06, 100,613.10 and 39,374.06

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Solution

The fourth proportional to 72,908.06, 100,613.10 and 39,374.06 is: 54,336.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,908.06 : 100,613.10 = 39,374.06 : x
  2. Step 2: Convert to fraction form
    72,908.06/100,613.10 = 39,374.06/x
  3. Step 3: Cross multiply
    72,908.06x = 100,613.10 × 39,374.06
  4. Step 4: Simplify right side
    72,908.06x = 3,961,546,236.19
  5. Step 5: Solve for x
    x = 3,961,546,236.19/72,908.06
  6. Step 6: Final answer
    x = 54,336.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.