Home / 80,909.32-121,360.20-28,330.60

Finding the Fourth Proportional to 80,909.32, 121,360.20 and 28,330.60

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Solution

The fourth proportional to 80,909.32, 121,360.20 and 28,330.60 is: 42,494.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,909.32 : 121,360.20 = 28,330.60 : x
  2. Step 2: Convert to fraction form
    80,909.32/121,360.20 = 28,330.60/x
  3. Step 3: Cross multiply
    80,909.32x = 121,360.20 × 28,330.60
  4. Step 4: Simplify right side
    80,909.32x = 3,438,207,282.12
  5. Step 5: Solve for x
    x = 3,438,207,282.12/80,909.32
  6. Step 6: Final answer
    x = 42,494.58

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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.