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Finding the Fourth Proportional to 83,894.90, 125,842.35 and 80,669.30

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Solution

The fourth proportional to 83,894.90, 125,842.35 and 80,669.30 is: 121,003.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,894.90 : 125,842.35 = 80,669.30 : x
  2. Step 2: Convert to fraction form
    83,894.90/125,842.35 = 80,669.30/x
  3. Step 3: Cross multiply
    83,894.90x = 125,842.35 × 80,669.30
  4. Step 4: Simplify right side
    83,894.90x = 10,151,614,284.86
  5. Step 5: Solve for x
    x = 10,151,614,284.86/83,894.90
  6. Step 6: Final answer
    x = 121,003.95

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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.