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Finding the Fourth Proportional to 127,390.32, 191,112.96 and 38,650.96

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Solution

The fourth proportional to 127,390.32, 191,112.96 and 38,650.96 is: 57,984.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,390.32 : 191,112.96 = 38,650.96 : x
  2. Step 2: Convert to fraction form
    127,390.32/191,112.96 = 38,650.96/x
  3. Step 3: Cross multiply
    127,390.32x = 191,112.96 × 38,650.96
  4. Step 4: Simplify right side
    127,390.32x = 7,386,699,372.44
  5. Step 5: Solve for x
    x = 7,386,699,372.44/127,390.32
  6. Step 6: Final answer
    x = 57,984.78

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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.