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Finding the Fourth Proportional to 123,671.88, 170,827.35 and 91,471.95

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Solution

The fourth proportional to 123,671.88, 170,827.35 and 91,471.95 is: 126,349.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,671.88 : 170,827.35 = 91,471.95 : x
  2. Step 2: Convert to fraction form
    123,671.88/170,827.35 = 91,471.95/x
  3. Step 3: Cross multiply
    123,671.88x = 170,827.35 × 91,471.95
  4. Step 4: Simplify right side
    123,671.88x = 15,625,910,817.83
  5. Step 5: Solve for x
    x = 15,625,910,817.83/123,671.88
  6. Step 6: Final answer
    x = 126,349.75

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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.