Home / 80,791.29-121,211.64-28,205.28

Finding the Fourth Proportional to 80,791.29, 121,211.64 and 28,205.28

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Solution

The fourth proportional to 80,791.29, 121,211.64 and 28,205.28 is: 42,316.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,791.29 : 121,211.64 = 28,205.28 : x
  2. Step 2: Convert to fraction form
    80,791.29/121,211.64 = 28,205.28/x
  3. Step 3: Cross multiply
    80,791.29x = 121,211.64 × 28,205.28
  4. Step 4: Simplify right side
    80,791.29x = 3,418,808,245.46
  5. Step 5: Solve for x
    x = 3,418,808,245.46/80,791.29
  6. Step 6: Final answer
    x = 42,316.54

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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.