Home / 80,614.20-120,921.30-78,886.20

Finding the Fourth Proportional to 80,614.20, 120,921.30 and 78,886.20

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Solution

The fourth proportional to 80,614.20, 120,921.30 and 78,886.20 is: 118,329.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,614.20 : 120,921.30 = 78,886.20 : x
  2. Step 2: Convert to fraction form
    80,614.20/120,921.30 = 78,886.20/x
  3. Step 3: Cross multiply
    80,614.20x = 120,921.30 × 78,886.20
  4. Step 4: Simplify right side
    80,614.20x = 9,539,021,856.06
  5. Step 5: Solve for x
    x = 9,539,021,856.06/80,614.20
  6. Step 6: Final answer
    x = 118,329.30

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Similar ratio
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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.