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Finding the Fourth Proportional to 228,691.34, 315,593.73 and 126,723.40

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Solution

The fourth proportional to 228,691.34, 315,593.73 and 126,723.40 is: 174,878.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,691.34 : 315,593.73 = 126,723.40 : x
  2. Step 2: Convert to fraction form
    228,691.34/315,593.73 = 126,723.40/x
  3. Step 3: Cross multiply
    228,691.34x = 315,593.73 × 126,723.40
  4. Step 4: Simplify right side
    228,691.34x = 39,993,109,853.70
  5. Step 5: Solve for x
    x = 39,993,109,853.70/228,691.34
  6. Step 6: Final answer
    x = 174,878.12

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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.