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Finding the Fourth Proportional to 131.60, 196.26 and 115.43

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Solution

The fourth proportional to 131.60, 196.26 and 115.43 is: 172.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.60 : 196.26 = 115.43 : x
  2. Step 2: Convert to fraction form
    131.60/196.26 = 115.43/x
  3. Step 3: Cross multiply
    131.60x = 196.26 × 115.43
  4. Step 4: Simplify right side
    131.60x = 22,653.61
  5. Step 5: Solve for x
    x = 22,653.61/131.60
  6. Step 6: Final answer
    x = 172.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.