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Finding the Fourth Proportional to 83,285.88, 124,969.86 and 38,915.70

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Solution

The fourth proportional to 83,285.88, 124,969.86 and 38,915.70 is: 58,392.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,285.88 : 124,969.86 = 38,915.70 : x
  2. Step 2: Convert to fraction form
    83,285.88/124,969.86 = 38,915.70/x
  3. Step 3: Cross multiply
    83,285.88x = 124,969.86 × 38,915.70
  4. Step 4: Simplify right side
    83,285.88x = 4,863,289,580.80
  5. Step 5: Solve for x
    x = 4,863,289,580.80/83,285.88
  6. Step 6: Final answer
    x = 58,392.73

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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.