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Finding the Fourth Proportional to 216,761.85, 325,142.78 and 123,449.85

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Solution

The fourth proportional to 216,761.85, 325,142.78 and 123,449.85 is: 185,174.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,761.85 : 325,142.78 = 123,449.85 : x
  2. Step 2: Convert to fraction form
    216,761.85/325,142.78 = 123,449.85/x
  3. Step 3: Cross multiply
    216,761.85x = 325,142.78 × 123,449.85
  4. Step 4: Simplify right side
    216,761.85x = 40,138,826,802.33
  5. Step 5: Solve for x
    x = 40,138,826,802.33/216,761.85
  6. Step 6: Final answer
    x = 185,174.78

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1.5x scale

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.