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Finding the Fourth Proportional to 72,235.17, 99,680.28 and 39,967.92

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Solution

The fourth proportional to 72,235.17, 99,680.28 and 39,967.92 is: 55,153.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,235.17 : 99,680.28 = 39,967.92 : x
  2. Step 2: Convert to fraction form
    72,235.17/99,680.28 = 39,967.92/x
  3. Step 3: Cross multiply
    72,235.17x = 99,680.28 × 39,967.92
  4. Step 4: Simplify right side
    72,235.17x = 3,984,013,456.62
  5. Step 5: Solve for x
    x = 3,984,013,456.62/72,235.17
  6. Step 6: Final answer
    x = 55,153.38

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Double scale
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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.