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Finding the Fourth Proportional to 89,671.97, 123,806.88 and 55,731.11

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Solution

The fourth proportional to 89,671.97, 123,806.88 and 55,731.11 is: 76,945.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,671.97 : 123,806.88 = 55,731.11 : x
  2. Step 2: Convert to fraction form
    89,671.97/123,806.88 = 55,731.11/x
  3. Step 3: Cross multiply
    89,671.97x = 123,806.88 × 55,731.11
  4. Step 4: Simplify right side
    89,671.97x = 6,899,894,229.00
  5. Step 5: Solve for x
    x = 6,899,894,229.00/89,671.97
  6. Step 6: Final answer
    x = 76,945.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.