Home / 80,151.12-120,221.82-20,985.48

Finding the Fourth Proportional to 80,151.12, 120,221.82 and 20,985.48

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Solution

The fourth proportional to 80,151.12, 120,221.82 and 20,985.48 is: 31,476.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,151.12 : 120,221.82 = 20,985.48 : x
  2. Step 2: Convert to fraction form
    80,151.12/120,221.82 = 20,985.48/x
  3. Step 3: Cross multiply
    80,151.12x = 120,221.82 × 20,985.48
  4. Step 4: Simplify right side
    80,151.12x = 2,522,912,599.17
  5. Step 5: Solve for x
    x = 2,522,912,599.17/80,151.12
  6. Step 6: Final answer
    x = 31,476.95

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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.