Home / 80,972.40-121,372.20-31,033.20

Finding the Fourth Proportional to 80,972.40, 121,372.20 and 31,033.20

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Solution

The fourth proportional to 80,972.40, 121,372.20 and 31,033.20 is: 46,516.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,972.40 : 121,372.20 = 31,033.20 : x
  2. Step 2: Convert to fraction form
    80,972.40/121,372.20 = 31,033.20/x
  3. Step 3: Cross multiply
    80,972.40x = 121,372.20 × 31,033.20
  4. Step 4: Simplify right side
    80,972.40x = 3,766,567,757.04
  5. Step 5: Solve for x
    x = 3,766,567,757.04/80,972.40
  6. Step 6: Final answer
    x = 46,516.69

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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.