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Finding the Fourth Proportional to 158.96, 238.50 and 72.29

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Solution

The fourth proportional to 158.96, 238.50 and 72.29 is: 108.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.96 : 238.50 = 72.29 : x
  2. Step 2: Convert to fraction form
    158.96/238.50 = 72.29/x
  3. Step 3: Cross multiply
    158.96x = 238.50 × 72.29
  4. Step 4: Simplify right side
    158.96x = 17,239.97
  5. Step 5: Solve for x
    x = 17,239.97/158.96
  6. Step 6: Final answer
    x = 108.46

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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.