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Finding the Fourth Proportional to 158.04, 217.95 and 123.16

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Solution

The fourth proportional to 158.04, 217.95 and 123.16 is: 169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.04 : 217.95 = 123.16 : x
  2. Step 2: Convert to fraction form
    158.04/217.95 = 123.16/x
  3. Step 3: Cross multiply
    158.04x = 217.95 × 123.16
  4. Step 4: Simplify right side
    158.04x = 26,842.72
  5. Step 5: Solve for x
    x = 26,842.72/158.04
  6. Step 6: Final answer
    x = 169.85

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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.