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Finding the Fourth Proportional to 228,721.12, 315,647.28 and 126,757.71

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Solution

The fourth proportional to 228,721.12, 315,647.28 and 126,757.71 is: 174,932.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,721.12 : 315,647.28 = 126,757.71 : x
  2. Step 2: Convert to fraction form
    228,721.12/315,647.28 = 126,757.71/x
  3. Step 3: Cross multiply
    228,721.12x = 315,647.28 × 126,757.71
  4. Step 4: Simplify right side
    228,721.12x = 40,010,726,380.53
  5. Step 5: Solve for x
    x = 40,010,726,380.53/228,721.12
  6. Step 6: Final answer
    x = 174,932.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.