Home / 80,631.72-120,969.36-28,044.12

Finding the Fourth Proportional to 80,631.72, 120,969.36 and 28,044.12

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Solution

The fourth proportional to 80,631.72, 120,969.36 and 28,044.12 is: 42,073.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,631.72 : 120,969.36 = 28,044.12 : x
  2. Step 2: Convert to fraction form
    80,631.72/120,969.36 = 28,044.12/x
  3. Step 3: Cross multiply
    80,631.72x = 120,969.36 × 28,044.12
  4. Step 4: Simplify right side
    80,631.72x = 3,392,479,248.16
  5. Step 5: Solve for x
    x = 3,392,479,248.16/80,631.72
  6. Step 6: Final answer
    x = 42,073.76

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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.