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Finding the Fourth Proportional to 72,472.10, 108,708.15 and 31,000.10

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Solution

The fourth proportional to 72,472.10, 108,708.15 and 31,000.10 is: 46,500.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,472.10 : 108,708.15 = 31,000.10 : x
  2. Step 2: Convert to fraction form
    72,472.10/108,708.15 = 31,000.10/x
  3. Step 3: Cross multiply
    72,472.10x = 108,708.15 × 31,000.10
  4. Step 4: Simplify right side
    72,472.10x = 3,369,963,520.82
  5. Step 5: Solve for x
    x = 3,369,963,520.82/72,472.10
  6. Step 6: Final answer
    x = 46,500.15

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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.