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Finding the Fourth Proportional to 129.60, 195.31 and 127.07

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Solution

The fourth proportional to 129.60, 195.31 and 127.07 is: 191.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.60 : 195.31 = 127.07 : x
  2. Step 2: Convert to fraction form
    129.60/195.31 = 127.07/x
  3. Step 3: Cross multiply
    129.60x = 195.31 × 127.07
  4. Step 4: Simplify right side
    129.60x = 24,817.96
  5. Step 5: Solve for x
    x = 24,817.96/129.60
  6. Step 6: Final answer
    x = 191.50

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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.