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Finding the Fourth Proportional to 129.50, 194.25 and 53.50

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Solution

The fourth proportional to 129.50, 194.25 and 53.50 is: 80.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.50 : 194.25 = 53.50 : x
  2. Step 2: Convert to fraction form
    129.50/194.25 = 53.50/x
  3. Step 3: Cross multiply
    129.50x = 194.25 × 53.50
  4. Step 4: Simplify right side
    129.50x = 10,392.38
  5. Step 5: Solve for x
    x = 10,392.38/129.50
  6. Step 6: Final answer
    x = 80.25

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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.