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Finding the Fourth Proportional to 118,642.12, 177,839.26 and 39,691.48

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Solution

The fourth proportional to 118,642.12, 177,839.26 and 39,691.48 is: 59,495.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,642.12 : 177,839.26 = 39,691.48 : x
  2. Step 2: Convert to fraction form
    118,642.12/177,839.26 = 39,691.48/x
  3. Step 3: Cross multiply
    118,642.12x = 177,839.26 × 39,691.48
  4. Step 4: Simplify right side
    118,642.12x = 7,058,703,431.50
  5. Step 5: Solve for x
    x = 7,058,703,431.50/118,642.12
  6. Step 6: Final answer
    x = 59,495.76

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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.