Home / 80,948.70-120,789.90-72,543.06

Finding the Fourth Proportional to 80,948.70, 120,789.90 and 72,543.06

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Solution

The fourth proportional to 80,948.70, 120,789.90 and 72,543.06 is: 108,247.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,948.70 : 120,789.90 = 72,543.06 : x
  2. Step 2: Convert to fraction form
    80,948.70/120,789.90 = 72,543.06/x
  3. Step 3: Cross multiply
    80,948.70x = 120,789.90 × 72,543.06
  4. Step 4: Simplify right side
    80,948.70x = 8,762,468,963.09
  5. Step 5: Solve for x
    x = 8,762,468,963.09/80,948.70
  6. Step 6: Final answer
    x = 108,247.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.