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Finding the Fourth Proportional to 72,472.30, 108,708.45 and 63,918.70

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Solution

The fourth proportional to 72,472.30, 108,708.45 and 63,918.70 is: 95,878.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,472.30 : 108,708.45 = 63,918.70 : x
  2. Step 2: Convert to fraction form
    72,472.30/108,708.45 = 63,918.70/x
  3. Step 3: Cross multiply
    72,472.30x = 108,708.45 × 63,918.70
  4. Step 4: Simplify right side
    72,472.30x = 6,948,502,803.02
  5. Step 5: Solve for x
    x = 6,948,502,803.02/72,472.30
  6. Step 6: Final answer
    x = 95,878.05

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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.