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Finding the Fourth Proportional to 83,043.80, 124,565.70 and 80,856.80

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Solution

The fourth proportional to 83,043.80, 124,565.70 and 80,856.80 is: 121,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,043.80 : 124,565.70 = 80,856.80 : x
  2. Step 2: Convert to fraction form
    83,043.80/124,565.70 = 80,856.80/x
  3. Step 3: Cross multiply
    83,043.80x = 124,565.70 × 80,856.80
  4. Step 4: Simplify right side
    83,043.80x = 10,071,983,891.76
  5. Step 5: Solve for x
    x = 10,071,983,891.76/83,043.80
  6. Step 6: Final answer
    x = 121,285.20

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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.