Home / 80,731.01-121,097.13-28,140.55

Finding the Fourth Proportional to 80,731.01, 121,097.13 and 28,140.55

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Solution

The fourth proportional to 80,731.01, 121,097.13 and 28,140.55 is: 42,211.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,731.01 : 121,097.13 = 28,140.55 : x
  2. Step 2: Convert to fraction form
    80,731.01/121,097.13 = 28,140.55/x
  3. Step 3: Cross multiply
    80,731.01x = 121,097.13 × 28,140.55
  4. Step 4: Simplify right side
    80,731.01x = 3,407,739,841.62
  5. Step 5: Solve for x
    x = 3,407,739,841.62/80,731.01
  6. Step 6: Final answer
    x = 42,211.04

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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.