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Finding the Fourth Proportional to 159.69, 240.49 and 139.65

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Solution

The fourth proportional to 159.69, 240.49 and 139.65 is: 210.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.69 : 240.49 = 139.65 : x
  2. Step 2: Convert to fraction form
    159.69/240.49 = 139.65/x
  3. Step 3: Cross multiply
    159.69x = 240.49 × 139.65
  4. Step 4: Simplify right side
    159.69x = 33,584.43
  5. Step 5: Solve for x
    x = 33,584.43/159.69
  6. Step 6: Final answer
    x = 210.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.