Home / 121,414.06-167,578.24-78,898.78

Finding the Fourth Proportional to 121,414.06, 167,578.24 and 78,898.78

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Solution

The fourth proportional to 121,414.06, 167,578.24 and 78,898.78 is: 108,897.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,414.06 : 167,578.24 = 78,898.78 : x
  2. Step 2: Convert to fraction form
    121,414.06/167,578.24 = 78,898.78/x
  3. Step 3: Cross multiply
    121,414.06x = 167,578.24 × 78,898.78
  4. Step 4: Simplify right side
    121,414.06x = 13,221,718,690.55
  5. Step 5: Solve for x
    x = 13,221,718,690.55/121,414.06
  6. Step 6: Final answer
    x = 108,897.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.