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Finding the Fourth Proportional to 127,229.20, 190,930.20 and 71,069.20

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Solution

The fourth proportional to 127,229.20, 190,930.20 and 71,069.20 is: 106,652.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,229.20 : 190,930.20 = 71,069.20 : x
  2. Step 2: Convert to fraction form
    127,229.20/190,930.20 = 71,069.20/x
  3. Step 3: Cross multiply
    127,229.20x = 190,930.20 × 71,069.20
  4. Step 4: Simplify right side
    127,229.20x = 13,569,256,569.84
  5. Step 5: Solve for x
    x = 13,569,256,569.84/127,229.20
  6. Step 6: Final answer
    x = 106,652.06

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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.