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Finding the Fourth Proportional to 72,149.60, 108,224.40 and 19,557.72

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Solution

The fourth proportional to 72,149.60, 108,224.40 and 19,557.72 is: 29,336.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,149.60 : 108,224.40 = 19,557.72 : x
  2. Step 2: Convert to fraction form
    72,149.60/108,224.40 = 19,557.72/x
  3. Step 3: Cross multiply
    72,149.60x = 108,224.40 × 19,557.72
  4. Step 4: Simplify right side
    72,149.60x = 2,116,622,585.71
  5. Step 5: Solve for x
    x = 2,116,622,585.71/72,149.60
  6. Step 6: Final answer
    x = 29,336.58

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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.