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Finding the Fourth Proportional to 127,310.54, 175,615.43 and 79,480.85

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Solution

The fourth proportional to 127,310.54, 175,615.43 and 79,480.85 is: 109,637.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,310.54 : 175,615.43 = 79,480.85 : x
  2. Step 2: Convert to fraction form
    127,310.54/175,615.43 = 79,480.85/x
  3. Step 3: Cross multiply
    127,310.54x = 175,615.43 × 79,480.85
  4. Step 4: Simplify right side
    127,310.54x = 13,958,062,374.03
  5. Step 5: Solve for x
    x = 13,958,062,374.03/127,310.54
  6. Step 6: Final answer
    x = 109,637.92

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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.