Home / 138,962.54-191,763.32-78,531.86

Finding the Fourth Proportional to 138,962.54, 191,763.32 and 78,531.86

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Solution

The fourth proportional to 138,962.54, 191,763.32 and 78,531.86 is: 108,371.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,962.54 : 191,763.32 = 78,531.86 : x
  2. Step 2: Convert to fraction form
    138,962.54/191,763.32 = 78,531.86/x
  3. Step 3: Cross multiply
    138,962.54x = 191,763.32 × 78,531.86
  4. Step 4: Simplify right side
    138,962.54x = 15,059,530,286.12
  5. Step 5: Solve for x
    x = 15,059,530,286.12/138,962.54
  6. Step 6: Final answer
    x = 108,371.15

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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.