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Finding the Fourth Proportional to 158.92, 219.40 and 115.32

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Solution

The fourth proportional to 158.92, 219.40 and 115.32 is: 159.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.92 : 219.40 = 115.32 : x
  2. Step 2: Convert to fraction form
    158.92/219.40 = 115.32/x
  3. Step 3: Cross multiply
    158.92x = 219.40 × 115.32
  4. Step 4: Simplify right side
    158.92x = 25,301.21
  5. Step 5: Solve for x
    x = 25,301.21/158.92
  6. Step 6: Final answer
    x = 159.21

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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.