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Finding the Fourth Proportional to 159.48, 219.80 and 115.74

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Solution

The fourth proportional to 159.48, 219.80 and 115.74 is: 159.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.48 : 219.80 = 115.74 : x
  2. Step 2: Convert to fraction form
    159.48/219.80 = 115.74/x
  3. Step 3: Cross multiply
    159.48x = 219.80 × 115.74
  4. Step 4: Simplify right side
    159.48x = 25,439.07
  5. Step 5: Solve for x
    x = 25,439.07/159.48
  6. Step 6: Final answer
    x = 159.51

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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.