Home / 80,557.20-120,691.80-38,912.40

Finding the Fourth Proportional to 80,557.20, 120,691.80 and 38,912.40

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Solution

The fourth proportional to 80,557.20, 120,691.80 and 38,912.40 is: 58,299.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,557.20 : 120,691.80 = 38,912.40 : x
  2. Step 2: Convert to fraction form
    80,557.20/120,691.80 = 38,912.40/x
  3. Step 3: Cross multiply
    80,557.20x = 120,691.80 × 38,912.40
  4. Step 4: Simplify right side
    80,557.20x = 4,696,407,598.32
  5. Step 5: Solve for x
    x = 4,696,407,598.32/80,557.20
  6. Step 6: Final answer
    x = 58,299.04

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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.