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Finding the Fourth Proportional to 83,342.10, 124,867.32 and 69,391.80

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Solution

The fourth proportional to 83,342.10, 124,867.32 and 69,391.80 is: 103,966.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,342.10 : 124,867.32 = 69,391.80 : x
  2. Step 2: Convert to fraction form
    83,342.10/124,867.32 = 69,391.80/x
  3. Step 3: Cross multiply
    83,342.10x = 124,867.32 × 69,391.80
  4. Step 4: Simplify right side
    83,342.10x = 8,664,768,095.98
  5. Step 5: Solve for x
    x = 8,664,768,095.98/83,342.10
  6. Step 6: Final answer
    x = 103,966.28

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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.