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Finding the Fourth Proportional to 272,750.28, 409,189.79 and 85,761.78

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Solution

The fourth proportional to 272,750.28, 409,189.79 and 85,761.78 is: 128,662.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,750.28 : 409,189.79 = 85,761.78 : x
  2. Step 2: Convert to fraction form
    272,750.28/409,189.79 = 85,761.78/x
  3. Step 3: Cross multiply
    272,750.28x = 409,189.79 × 85,761.78
  4. Step 4: Simplify right side
    272,750.28x = 35,092,842,273.47
  5. Step 5: Solve for x
    x = 35,092,842,273.47/272,750.28
  6. Step 6: Final answer
    x = 128,662.90

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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.