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Finding the Fourth Proportional to 187,761.92, 281,612.16 and 69,489.28

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Solution

The fourth proportional to 187,761.92, 281,612.16 and 69,489.28 is: 104,222.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,761.92 : 281,612.16 = 69,489.28 : x
  2. Step 2: Convert to fraction form
    187,761.92/281,612.16 = 69,489.28/x
  3. Step 3: Cross multiply
    187,761.92x = 281,612.16 × 69,489.28
  4. Step 4: Simplify right side
    187,761.92x = 19,569,026,237.64
  5. Step 5: Solve for x
    x = 19,569,026,237.64/187,761.92
  6. Step 6: Final answer
    x = 104,222.55

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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.