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Finding the Fourth Proportional to 80,891.70, 121,337.55 and 45,899.70

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Solution

The fourth proportional to 80,891.70, 121,337.55 and 45,899.70 is: 68,849.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,891.70 : 121,337.55 = 45,899.70 : x
  2. Step 2: Convert to fraction form
    80,891.70/121,337.55 = 45,899.70/x
  3. Step 3: Cross multiply
    80,891.70x = 121,337.55 × 45,899.70
  4. Step 4: Simplify right side
    80,891.70x = 5,569,357,143.74
  5. Step 5: Solve for x
    x = 5,569,357,143.74/80,891.70
  6. Step 6: Final answer
    x = 68,849.55

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Double scale
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Similar ratio
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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.