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Finding the Fourth Proportional to 80,488.80, 120,727.80 and 21,323.16

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Solution

The fourth proportional to 80,488.80, 120,727.80 and 21,323.16 is: 31,983.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,488.80 : 120,727.80 = 21,323.16 : x
  2. Step 2: Convert to fraction form
    80,488.80/120,727.80 = 21,323.16/x
  3. Step 3: Cross multiply
    80,488.80x = 120,727.80 × 21,323.16
  4. Step 4: Simplify right side
    80,488.80x = 2,574,298,195.85
  5. Step 5: Solve for x
    x = 2,574,298,195.85/80,488.80
  6. Step 6: Final answer
    x = 31,983.31

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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.