Home / 80,811.10-121,184.25-47,539.90

Finding the Fourth Proportional to 80,811.10, 121,184.25 and 47,539.90

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Solution

The fourth proportional to 80,811.10, 121,184.25 and 47,539.90 is: 71,290.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,811.10 : 121,184.25 = 47,539.90 : x
  2. Step 2: Convert to fraction form
    80,811.10/121,184.25 = 47,539.90/x
  3. Step 3: Cross multiply
    80,811.10x = 121,184.25 × 47,539.90
  4. Step 4: Simplify right side
    80,811.10x = 5,761,087,126.58
  5. Step 5: Solve for x
    x = 5,761,087,126.58/80,811.10
  6. Step 6: Final answer
    x = 71,290.79

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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.