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Finding the Fourth Proportional to 83,081.70, 124,622.55 and 74,787.30

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Solution

The fourth proportional to 83,081.70, 124,622.55 and 74,787.30 is: 112,180.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,081.70 : 124,622.55 = 74,787.30 : x
  2. Step 2: Convert to fraction form
    83,081.70/124,622.55 = 74,787.30/x
  3. Step 3: Cross multiply
    83,081.70x = 124,622.55 × 74,787.30
  4. Step 4: Simplify right side
    83,081.70x = 9,320,184,033.62
  5. Step 5: Solve for x
    x = 9,320,184,033.62/83,081.70
  6. Step 6: Final answer
    x = 112,180.95

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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.