Home / 91,375.20-126,028.20-78,650.04

Finding the Fourth Proportional to 91,375.20, 126,028.20 and 78,650.04

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Solution

The fourth proportional to 91,375.20, 126,028.20 and 78,650.04 is: 108,477.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,375.20 : 126,028.20 = 78,650.04 : x
  2. Step 2: Convert to fraction form
    91,375.20/126,028.20 = 78,650.04/x
  3. Step 3: Cross multiply
    91,375.20x = 126,028.20 × 78,650.04
  4. Step 4: Simplify right side
    91,375.20x = 9,912,122,971.13
  5. Step 5: Solve for x
    x = 9,912,122,971.13/91,375.20
  6. Step 6: Final answer
    x = 108,477.17

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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.