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Finding the Fourth Proportional to 158.97, 238.49 and 90.50

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Solution

The fourth proportional to 158.97, 238.49 and 90.50 is: 135.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.97 : 238.49 = 90.50 : x
  2. Step 2: Convert to fraction form
    158.97/238.49 = 90.50/x
  3. Step 3: Cross multiply
    158.97x = 238.49 × 90.50
  4. Step 4: Simplify right side
    158.97x = 21,582.38
  5. Step 5: Solve for x
    x = 21,582.38/158.97
  6. Step 6: Final answer
    x = 135.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.