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Finding the Fourth Proportional to 127,388.32, 191,109.96 and 38,648.97

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Solution

The fourth proportional to 127,388.32, 191,109.96 and 38,648.97 is: 57,981.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,388.32 : 191,109.96 = 38,648.97 : x
  2. Step 2: Convert to fraction form
    127,388.32/191,109.96 = 38,648.97/x
  3. Step 3: Cross multiply
    127,388.32x = 191,109.96 × 38,648.97
  4. Step 4: Simplify right side
    127,388.32x = 7,386,203,110.74
  5. Step 5: Solve for x
    x = 7,386,203,110.74/127,388.32
  6. Step 6: Final answer
    x = 57,981.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.