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Finding the Fourth Proportional to 126,887.20, 190,330.80 and 115,223.20

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Solution

The fourth proportional to 126,887.20, 190,330.80 and 115,223.20 is: 172,834.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,887.20 : 190,330.80 = 115,223.20 : x
  2. Step 2: Convert to fraction form
    126,887.20/190,330.80 = 115,223.20/x
  3. Step 3: Cross multiply
    126,887.20x = 190,330.80 × 115,223.20
  4. Step 4: Simplify right side
    126,887.20x = 21,930,523,834.56
  5. Step 5: Solve for x
    x = 21,930,523,834.56/126,887.20
  6. Step 6: Final answer
    x = 172,834.80

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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.