Home / 80,778.29-121,165.70-21,613.95

Finding the Fourth Proportional to 80,778.29, 121,165.70 and 21,613.95

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Solution

The fourth proportional to 80,778.29, 121,165.70 and 21,613.95 is: 32,420.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,778.29 : 121,165.70 = 21,613.95 : x
  2. Step 2: Convert to fraction form
    80,778.29/121,165.70 = 21,613.95/x
  3. Step 3: Cross multiply
    80,778.29x = 121,165.70 × 21,613.95
  4. Step 4: Simplify right side
    80,778.29x = 2,618,869,273.45
  5. Step 5: Solve for x
    x = 2,618,869,273.45/80,778.29
  6. Step 6: Final answer
    x = 32,420.46

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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.