Home / 138,514.62-191,126.07-81,905.34

Finding the Fourth Proportional to 138,514.62, 191,126.07 and 81,905.34

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Solution

The fourth proportional to 138,514.62, 191,126.07 and 81,905.34 is: 113,015.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,514.62 : 191,126.07 = 81,905.34 : x
  2. Step 2: Convert to fraction form
    138,514.62/191,126.07 = 81,905.34/x
  3. Step 3: Cross multiply
    138,514.62x = 191,126.07 × 81,905.34
  4. Step 4: Simplify right side
    138,514.62x = 15,654,245,746.21
  5. Step 5: Solve for x
    x = 15,654,245,746.21/138,514.62
  6. Step 6: Final answer
    x = 113,015.12

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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.