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Finding the Fourth Proportional to 79,728.52, 119,587.92 and 32,980.20

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Solution

The fourth proportional to 79,728.52, 119,587.92 and 32,980.20 is: 49,468.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,728.52 : 119,587.92 = 32,980.20 : x
  2. Step 2: Convert to fraction form
    79,728.52/119,587.92 = 32,980.20/x
  3. Step 3: Cross multiply
    79,728.52x = 119,587.92 × 32,980.20
  4. Step 4: Simplify right side
    79,728.52x = 3,944,033,519.18
  5. Step 5: Solve for x
    x = 3,944,033,519.18/79,728.52
  6. Step 6: Final answer
    x = 49,468.29

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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.