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Finding the Fourth Proportional to 129.65, 195.50 and 118.89

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Solution

The fourth proportional to 129.65, 195.50 and 118.89 is: 179.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.65 : 195.50 = 118.89 : x
  2. Step 2: Convert to fraction form
    129.65/195.50 = 118.89/x
  3. Step 3: Cross multiply
    129.65x = 195.50 × 118.89
  4. Step 4: Simplify right side
    129.65x = 23,242.40
  5. Step 5: Solve for x
    x = 23,242.40/129.65
  6. Step 6: Final answer
    x = 179.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.