Home / 80,613.20-120,921-28,024.48

Finding the Fourth Proportional to 80,613.20, 120,921 and 28,024.48

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Solution

The fourth proportional to 80,613.20, 120,921 and 28,024.48 is: 42,037.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,613.20 : 120,921 = 28,024.48 : x
  2. Step 2: Convert to fraction form
    80,613.20/120,921 = 28,024.48/x
  3. Step 3: Cross multiply
    80,613.20x = 120,921 × 28,024.48
  4. Step 4: Simplify right side
    80,613.20x = 3,388,748,146.08
  5. Step 5: Solve for x
    x = 3,388,748,146.08/80,613.20
  6. Step 6: Final answer
    x = 42,037.14

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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.