Home / 138,608.58-191,279.56-78,179.04

Finding the Fourth Proportional to 138,608.58, 191,279.56 and 78,179.04

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Solution

The fourth proportional to 138,608.58, 191,279.56 and 78,179.04 is: 107,886.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.58 : 191,279.56 = 78,179.04 : x
  2. Step 2: Convert to fraction form
    138,608.58/191,279.56 = 78,179.04/x
  3. Step 3: Cross multiply
    138,608.58x = 191,279.56 × 78,179.04
  4. Step 4: Simplify right side
    138,608.58x = 14,954,052,372.42
  5. Step 5: Solve for x
    x = 14,954,052,372.42/138,608.58
  6. Step 6: Final answer
    x = 107,886.92

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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.