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Finding the Fourth Proportional to 230,520.78, 318,121.14 and 129,918.78

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Solution

The fourth proportional to 230,520.78, 318,121.14 and 129,918.78 is: 179,289.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,520.78 : 318,121.14 = 129,918.78 : x
  2. Step 2: Convert to fraction form
    230,520.78/318,121.14 = 129,918.78/x
  3. Step 3: Cross multiply
    230,520.78x = 318,121.14 × 129,918.78
  4. Step 4: Simplify right side
    230,520.78x = 41,329,910,401.01
  5. Step 5: Solve for x
    x = 41,329,910,401.01/230,520.78
  6. Step 6: Final answer
    x = 179,289.30

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1.5x scale

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.