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Finding the Fourth Proportional to 83,491.80, 125,278.86 and 39,110.88

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Solution

The fourth proportional to 83,491.80, 125,278.86 and 39,110.88 is: 58,685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,491.80 : 125,278.86 = 39,110.88 : x
  2. Step 2: Convert to fraction form
    83,491.80/125,278.86 = 39,110.88/x
  3. Step 3: Cross multiply
    83,491.80x = 125,278.86 × 39,110.88
  4. Step 4: Simplify right side
    83,491.80x = 4,899,766,460.00
  5. Step 5: Solve for x
    x = 4,899,766,460.00/83,491.80
  6. Step 6: Final answer
    x = 58,685.60

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1.5x scale

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.