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Finding the Fourth Proportional to 71,995.78, 107,909.56 and 54,169.16

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Solution

The fourth proportional to 71,995.78, 107,909.56 and 54,169.16 is: 81,190.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,995.78 : 107,909.56 = 54,169.16 : x
  2. Step 2: Convert to fraction form
    71,995.78/107,909.56 = 54,169.16/x
  3. Step 3: Cross multiply
    71,995.78x = 107,909.56 × 54,169.16
  4. Step 4: Simplify right side
    71,995.78x = 5,845,370,221.17
  5. Step 5: Solve for x
    x = 5,845,370,221.17/71,995.78
  6. Step 6: Final answer
    x = 81,190.46

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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.