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Finding the Fourth Proportional to 71,901.92, 99,224.80 and 40,070.18

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Solution

The fourth proportional to 71,901.92, 99,224.80 and 40,070.18 is: 55,296.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,901.92 : 99,224.80 = 40,070.18 : x
  2. Step 2: Convert to fraction form
    71,901.92/99,224.80 = 40,070.18/x
  3. Step 3: Cross multiply
    71,901.92x = 99,224.80 × 40,070.18
  4. Step 4: Simplify right side
    71,901.92x = 3,975,955,596.46
  5. Step 5: Solve for x
    x = 3,975,955,596.46/71,901.92
  6. Step 6: Final answer
    x = 55,296.93

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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.