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Finding the Fourth Proportional to 71,729.28, 107,501.28 and 59,808.90

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Solution

The fourth proportional to 71,729.28, 107,501.28 and 59,808.90 is: 89,636.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,729.28 : 107,501.28 = 59,808.90 : x
  2. Step 2: Convert to fraction form
    71,729.28/107,501.28 = 59,808.90/x
  3. Step 3: Cross multiply
    71,729.28x = 107,501.28 × 59,808.90
  4. Step 4: Simplify right side
    71,729.28x = 6,429,533,305.39
  5. Step 5: Solve for x
    x = 6,429,533,305.39/71,729.28
  6. Step 6: Final answer
    x = 89,636.11

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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.