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Finding the Fourth Proportional to 61,207.20, 91,813.14 and 21,769.92

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Solution

The fourth proportional to 61,207.20, 91,813.14 and 21,769.92 is: 32,655.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,207.20 : 91,813.14 = 21,769.92 : x
  2. Step 2: Convert to fraction form
    61,207.20/91,813.14 = 21,769.92/x
  3. Step 3: Cross multiply
    61,207.20x = 91,813.14 × 21,769.92
  4. Step 4: Simplify right side
    61,207.20x = 1,998,764,712.75
  5. Step 5: Solve for x
    x = 1,998,764,712.75/61,207.20
  6. Step 6: Final answer
    x = 32,655.71

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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.