Home / 80,531.52-120,778.92-30,617.16

Finding the Fourth Proportional to 80,531.52, 120,778.92 and 30,617.16

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Solution

The fourth proportional to 80,531.52, 120,778.92 and 30,617.16 is: 45,918.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,531.52 : 120,778.92 = 30,617.16 : x
  2. Step 2: Convert to fraction form
    80,531.52/120,778.92 = 30,617.16/x
  3. Step 3: Cross multiply
    80,531.52x = 120,778.92 × 30,617.16
  4. Step 4: Simplify right side
    80,531.52x = 3,697,907,518.27
  5. Step 5: Solve for x
    x = 3,697,907,518.27/80,531.52
  6. Step 6: Final answer
    x = 45,918.76

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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.