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Finding the Fourth Proportional to 203,708.10, 305,440.65 and 124,878.90

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Solution

The fourth proportional to 203,708.10, 305,440.65 and 124,878.90 is: 187,243.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,708.10 : 305,440.65 = 124,878.90 : x
  2. Step 2: Convert to fraction form
    203,708.10/305,440.65 = 124,878.90/x
  3. Step 3: Cross multiply
    203,708.10x = 305,440.65 × 124,878.90
  4. Step 4: Simplify right side
    203,708.10x = 38,143,092,387.29
  5. Step 5: Solve for x
    x = 38,143,092,387.29/203,708.10
  6. Step 6: Final answer
    x = 187,243.87

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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.