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Finding the Fourth Proportional to 129.41, 193.98 and 52.29

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Solution

The fourth proportional to 129.41, 193.98 and 52.29 is: 78.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.41 : 193.98 = 52.29 : x
  2. Step 2: Convert to fraction form
    129.41/193.98 = 52.29/x
  3. Step 3: Cross multiply
    129.41x = 193.98 × 52.29
  4. Step 4: Simplify right side
    129.41x = 10,142.57
  5. Step 5: Solve for x
    x = 10,142.57/129.41
  6. Step 6: Final answer
    x = 78.38

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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.