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Finding the Fourth Proportional to 80,442.80, 120,658.80 and 21,277.16

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Solution

The fourth proportional to 80,442.80, 120,658.80 and 21,277.16 is: 31,914.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,442.80 : 120,658.80 = 21,277.16 : x
  2. Step 2: Convert to fraction form
    80,442.80/120,658.80 = 21,277.16/x
  3. Step 3: Cross multiply
    80,442.80x = 120,658.80 × 21,277.16
  4. Step 4: Simplify right side
    80,442.80x = 2,567,276,593.01
  5. Step 5: Solve for x
    x = 2,567,276,593.01/80,442.80
  6. Step 6: Final answer
    x = 31,914.31

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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.