Home / 138,872.66-191,656.07-78,454.39

Finding the Fourth Proportional to 138,872.66, 191,656.07 and 78,454.39

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Solution

The fourth proportional to 138,872.66, 191,656.07 and 78,454.39 is: 108,273.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872.66 : 191,656.07 = 78,454.39 : x
  2. Step 2: Convert to fraction form
    138,872.66/191,656.07 = 78,454.39/x
  3. Step 3: Cross multiply
    138,872.66x = 191,656.07 × 78,454.39
  4. Step 4: Simplify right side
    138,872.66x = 15,036,260,540.79
  5. Step 5: Solve for x
    x = 15,036,260,540.79/138,872.66
  6. Step 6: Final answer
    x = 108,273.73

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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.