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Finding the Fourth Proportional to 228,909.89, 315,899.48 and 126,939.65

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Solution

The fourth proportional to 228,909.89, 315,899.48 and 126,939.65 is: 175,178.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,909.89 : 315,899.48 = 126,939.65 : x
  2. Step 2: Convert to fraction form
    228,909.89/315,899.48 = 126,939.65/x
  3. Step 3: Cross multiply
    228,909.89x = 315,899.48 × 126,939.65
  4. Step 4: Simplify right side
    228,909.89x = 40,100,168,164.23
  5. Step 5: Solve for x
    x = 40,100,168,164.23/228,909.89
  6. Step 6: Final answer
    x = 175,178.83

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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.