Home / 80,992.30-121,543.20-28,402.24

Finding the Fourth Proportional to 80,992.30, 121,543.20 and 28,402.24

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Solution

The fourth proportional to 80,992.30, 121,543.20 and 28,402.24 is: 42,622.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,992.30 : 121,543.20 = 28,402.24 : x
  2. Step 2: Convert to fraction form
    80,992.30/121,543.20 = 28,402.24/x
  3. Step 3: Cross multiply
    80,992.30x = 121,543.20 × 28,402.24
  4. Step 4: Simplify right side
    80,992.30x = 3,452,099,136.77
  5. Step 5: Solve for x
    x = 3,452,099,136.77/80,992.30
  6. Step 6: Final answer
    x = 42,622.56

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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.