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Finding the Fourth Proportional to 80,986.53, 121,514.88 and 43,502.87

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Solution

The fourth proportional to 80,986.53, 121,514.88 and 43,502.87 is: 65,273.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,986.53 : 121,514.88 = 43,502.87 : x
  2. Step 2: Convert to fraction form
    80,986.53/121,514.88 = 43,502.87/x
  3. Step 3: Cross multiply
    80,986.53x = 121,514.88 × 43,502.87
  4. Step 4: Simplify right side
    80,986.53x = 5,286,246,494.63
  5. Step 5: Solve for x
    x = 5,286,246,494.63/80,986.53
  6. Step 6: Final answer
    x = 65,273.15

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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.