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Finding the Fourth Proportional to 83,476.85, 124,915.97 and 72,270.74

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Solution

The fourth proportional to 83,476.85, 124,915.97 and 72,270.74 is: 108,146.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,476.85 : 124,915.97 = 72,270.74 : x
  2. Step 2: Convert to fraction form
    83,476.85/124,915.97 = 72,270.74/x
  3. Step 3: Cross multiply
    83,476.85x = 124,915.97 × 72,270.74
  4. Step 4: Simplify right side
    83,476.85x = 9,027,768,603.78
  5. Step 5: Solve for x
    x = 9,027,768,603.78/83,476.85
  6. Step 6: Final answer
    x = 108,146.97

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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.