Home / 80,987.28-121,482.00-28,398.30

Finding the Fourth Proportional to 80,987.28, 121,482.00 and 28,398.30

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Solution

The fourth proportional to 80,987.28, 121,482.00 and 28,398.30 is: 42,597.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,987.28 : 121,482.00 = 28,398.30 : x
  2. Step 2: Convert to fraction form
    80,987.28/121,482.00 = 28,398.30/x
  3. Step 3: Cross multiply
    80,987.28x = 121,482.00 × 28,398.30
  4. Step 4: Simplify right side
    80,987.28x = 3,449,882,690.80
  5. Step 5: Solve for x
    x = 3,449,882,690.80/80,987.28
  6. Step 6: Final answer
    x = 42,597.83

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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.