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Finding the Fourth Proportional to 228,781.26, 315,724.43 and 125,421.21

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Solution

The fourth proportional to 228,781.26, 315,724.43 and 125,421.21 is: 173,084.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,781.26 : 315,724.43 = 125,421.21 : x
  2. Step 2: Convert to fraction form
    228,781.26/315,724.43 = 125,421.21/x
  3. Step 3: Cross multiply
    228,781.26x = 315,724.43 × 125,421.21
  4. Step 4: Simplify right side
    228,781.26x = 39,598,540,350.71
  5. Step 5: Solve for x
    x = 39,598,540,350.71/228,781.26
  6. Step 6: Final answer
    x = 173,084.72

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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.