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Finding the Fourth Proportional to 158.66, 238.07 and 90.26

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Solution

The fourth proportional to 158.66, 238.07 and 90.26 is: 135.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.66 : 238.07 = 90.26 : x
  2. Step 2: Convert to fraction form
    158.66/238.07 = 90.26/x
  3. Step 3: Cross multiply
    158.66x = 238.07 × 90.26
  4. Step 4: Simplify right side
    158.66x = 21,487.23
  5. Step 5: Solve for x
    x = 21,487.23/158.66
  6. Step 6: Final answer
    x = 135.43

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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.