Home / 83,915.40-125,874.78-31,314.39

Finding the Fourth Proportional to 83,915.40, 125,874.78 and 31,314.39

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Solution

The fourth proportional to 83,915.40, 125,874.78 and 31,314.39 is: 46,972.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,915.40 : 125,874.78 = 31,314.39 : x
  2. Step 2: Convert to fraction form
    83,915.40/125,874.78 = 31,314.39/x
  3. Step 3: Cross multiply
    83,915.40x = 125,874.78 × 31,314.39
  4. Step 4: Simplify right side
    83,915.40x = 3,941,691,952.08
  5. Step 5: Solve for x
    x = 3,941,691,952.08/83,915.40
  6. Step 6: Final answer
    x = 46,972.21

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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.