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Finding the Fourth Proportional to 71,850.76, 107,776.16 and 21,931.14

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Solution

The fourth proportional to 71,850.76, 107,776.16 and 21,931.14 is: 32,896.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,850.76 : 107,776.16 = 21,931.14 : x
  2. Step 2: Convert to fraction form
    71,850.76/107,776.16 = 21,931.14/x
  3. Step 3: Cross multiply
    71,850.76x = 107,776.16 × 21,931.14
  4. Step 4: Simplify right side
    71,850.76x = 2,363,654,053.62
  5. Step 5: Solve for x
    x = 2,363,654,053.62/71,850.76
  6. Step 6: Final answer
    x = 32,896.72

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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.