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Finding the Fourth Proportional to 127,470.60, 191,209.14 and 71,279.28

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Solution

The fourth proportional to 127,470.60, 191,209.14 and 71,279.28 is: 106,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,470.60 : 191,209.14 = 71,279.28 : x
  2. Step 2: Convert to fraction form
    127,470.60/191,209.14 = 71,279.28/x
  3. Step 3: Cross multiply
    127,470.60x = 191,209.14 × 71,279.28
  4. Step 4: Simplify right side
    127,470.60x = 13,629,249,828.62
  5. Step 5: Solve for x
    x = 13,629,249,828.62/127,470.60
  6. Step 6: Final answer
    x = 106,920.73

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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.