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Finding the Fourth Proportional to 228,668.11, 315,557.91 and 126,691.54

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Solution

The fourth proportional to 228,668.11, 315,557.91 and 126,691.54 is: 174,832.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,668.11 : 315,557.91 = 126,691.54 : x
  2. Step 2: Convert to fraction form
    228,668.11/315,557.91 = 126,691.54/x
  3. Step 3: Cross multiply
    228,668.11x = 315,557.91 × 126,691.54
  4. Step 4: Simplify right side
    228,668.11x = 39,978,516,788.19
  5. Step 5: Solve for x
    x = 39,978,516,788.19/228,668.11
  6. Step 6: Final answer
    x = 174,832.06

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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.