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Finding the Fourth Proportional to 158.09, 217.95 and 118.18

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Solution

The fourth proportional to 158.09, 217.95 and 118.18 is: 162.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.09 : 217.95 = 118.18 : x
  2. Step 2: Convert to fraction form
    158.09/217.95 = 118.18/x
  3. Step 3: Cross multiply
    158.09x = 217.95 × 118.18
  4. Step 4: Simplify right side
    158.09x = 25,756.24
  5. Step 5: Solve for x
    x = 25,756.24/158.09
  6. Step 6: Final answer
    x = 162.92

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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.