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Finding the Fourth Proportional to 265,723.20, 398,329.65 and 88,138.80

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Solution

The fourth proportional to 265,723.20, 398,329.65 and 88,138.80 is: 132,123.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,723.20 : 398,329.65 = 88,138.80 : x
  2. Step 2: Convert to fraction form
    265,723.20/398,329.65 = 88,138.80/x
  3. Step 3: Cross multiply
    265,723.20x = 398,329.65 × 88,138.80
  4. Step 4: Simplify right side
    265,723.20x = 35,108,297,355.42
  5. Step 5: Solve for x
    x = 35,108,297,355.42/265,723.20
  6. Step 6: Final answer
    x = 132,123.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.