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Finding the Fourth Proportional to 83,243.70, 124,865.55 and 68,469.30

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Solution

The fourth proportional to 83,243.70, 124,865.55 and 68,469.30 is: 102,703.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,243.70 : 124,865.55 = 68,469.30 : x
  2. Step 2: Convert to fraction form
    83,243.70/124,865.55 = 68,469.30/x
  3. Step 3: Cross multiply
    83,243.70x = 124,865.55 × 68,469.30
  4. Step 4: Simplify right side
    83,243.70x = 8,549,456,802.62
  5. Step 5: Solve for x
    x = 8,549,456,802.62/83,243.70
  6. Step 6: Final answer
    x = 102,703.95

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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.