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Finding the Fourth Proportional to 175.50, 242.25 and 129.03

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Solution

The fourth proportional to 175.50, 242.25 and 129.03 is: 178.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.50 : 242.25 = 129.03 : x
  2. Step 2: Convert to fraction form
    175.50/242.25 = 129.03/x
  3. Step 3: Cross multiply
    175.50x = 242.25 × 129.03
  4. Step 4: Simplify right side
    175.50x = 31,257.52
  5. Step 5: Solve for x
    x = 31,257.52/175.50
  6. Step 6: Final answer
    x = 178.11

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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.