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Finding the Fourth Proportional to 228,943.43, 315,958.13 and 126,978.61

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Solution

The fourth proportional to 228,943.43, 315,958.13 and 126,978.61 is: 175,239.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,943.43 : 315,958.13 = 126,978.61 : x
  2. Step 2: Convert to fraction form
    228,943.43/315,958.13 = 126,978.61/x
  3. Step 3: Cross multiply
    228,943.43x = 315,958.13 × 126,978.61
  4. Step 4: Simplify right side
    228,943.43x = 40,119,924,165.60
  5. Step 5: Solve for x
    x = 40,119,924,165.60/228,943.43
  6. Step 6: Final answer
    x = 175,239.46

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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.