Home / 80,982.40-121,473.60-28,397.20

Finding the Fourth Proportional to 80,982.40, 121,473.60 and 28,397.20

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Solution

The fourth proportional to 80,982.40, 121,473.60 and 28,397.20 is: 42,595.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,982.40 : 121,473.60 = 28,397.20 : x
  2. Step 2: Convert to fraction form
    80,982.40/121,473.60 = 28,397.20/x
  3. Step 3: Cross multiply
    80,982.40x = 121,473.60 × 28,397.20
  4. Step 4: Simplify right side
    80,982.40x = 3,449,510,113.92
  5. Step 5: Solve for x
    x = 3,449,510,113.92/80,982.40
  6. Step 6: Final answer
    x = 42,595.80

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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.