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Finding the Fourth Proportional to 127,188.90, 175,521.36 and 79,469.92

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Solution

The fourth proportional to 127,188.90, 175,521.36 and 79,469.92 is: 109,668.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,188.90 : 175,521.36 = 79,469.92 : x
  2. Step 2: Convert to fraction form
    127,188.90/175,521.36 = 79,469.92/x
  3. Step 3: Cross multiply
    127,188.90x = 175,521.36 × 79,469.92
  4. Step 4: Simplify right side
    127,188.90x = 13,948,668,437.49
  5. Step 5: Solve for x
    x = 13,948,668,437.49/127,188.90
  6. Step 6: Final answer
    x = 109,668.91

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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.