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Finding the Fourth Proportional to 127,187.20, 190,867.20 and 71,027.20

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Solution

The fourth proportional to 127,187.20, 190,867.20 and 71,027.20 is: 106,589.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,187.20 : 190,867.20 = 71,027.20 : x
  2. Step 2: Convert to fraction form
    127,187.20/190,867.20 = 71,027.20/x
  3. Step 3: Cross multiply
    127,187.20x = 190,867.20 × 71,027.20
  4. Step 4: Simplify right side
    127,187.20x = 13,556,762,787.84
  5. Step 5: Solve for x
    x = 13,556,762,787.84/127,187.20
  6. Step 6: Final answer
    x = 106,589.05

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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.