Home / 120,741.20-181,306.20-81,472.40

Finding the Fourth Proportional to 120,741.20, 181,306.20 and 81,472.40

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Solution

The fourth proportional to 120,741.20, 181,306.20 and 81,472.40 is: 122,339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,741.20 : 181,306.20 = 81,472.40 : x
  2. Step 2: Convert to fraction form
    120,741.20/181,306.20 = 81,472.40/x
  3. Step 3: Cross multiply
    120,741.20x = 181,306.20 × 81,472.40
  4. Step 4: Simplify right side
    120,741.20x = 14,771,451,248.88
  5. Step 5: Solve for x
    x = 14,771,451,248.88/120,741.20
  6. Step 6: Final answer
    x = 122,339.78

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1.5x scale

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.