Home / 120,964.20-181,446.30-87,613.80

Finding the Fourth Proportional to 120,964.20, 181,446.30 and 87,613.80

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Solution

The fourth proportional to 120,964.20, 181,446.30 and 87,613.80 is: 131,420.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,964.20 : 181,446.30 = 87,613.80 : x
  2. Step 2: Convert to fraction form
    120,964.20/181,446.30 = 87,613.80/x
  3. Step 3: Cross multiply
    120,964.20x = 181,446.30 × 87,613.80
  4. Step 4: Simplify right side
    120,964.20x = 15,897,199,838.94
  5. Step 5: Solve for x
    x = 15,897,199,838.94/120,964.20
  6. Step 6: Final answer
    x = 131,420.70

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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.