Home / 100,608.06-138,842.85-55,287.95

Finding the Fourth Proportional to 100,608.06, 138,842.85 and 55,287.95

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Solution

The fourth proportional to 100,608.06, 138,842.85 and 55,287.95 is: 76,299.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608.06 : 138,842.85 = 55,287.95 : x
  2. Step 2: Convert to fraction form
    100,608.06/138,842.85 = 55,287.95/x
  3. Step 3: Cross multiply
    100,608.06x = 138,842.85 × 55,287.95
  4. Step 4: Simplify right side
    100,608.06x = 7,676,335,854.44
  5. Step 5: Solve for x
    x = 7,676,335,854.44/100,608.06
  6. Step 6: Final answer
    x = 76,299.41

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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.