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Finding the Fourth Proportional to 60,700.85, 91,092.17 and 21,258.30

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Solution

The fourth proportional to 60,700.85, 91,092.17 and 21,258.30 is: 31,901.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,700.85 : 91,092.17 = 21,258.30 : x
  2. Step 2: Convert to fraction form
    60,700.85/91,092.17 = 21,258.30/x
  3. Step 3: Cross multiply
    60,700.85x = 91,092.17 × 21,258.30
  4. Step 4: Simplify right side
    60,700.85x = 1,936,464,730.66
  5. Step 5: Solve for x
    x = 1,936,464,730.66/60,700.85
  6. Step 6: Final answer
    x = 31,901.78

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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.