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Finding the Fourth Proportional to 131.93, 196.87 and 115.93

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Solution

The fourth proportional to 131.93, 196.87 and 115.93 is: 172.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.93 : 196.87 = 115.93 : x
  2. Step 2: Convert to fraction form
    131.93/196.87 = 115.93/x
  3. Step 3: Cross multiply
    131.93x = 196.87 × 115.93
  4. Step 4: Simplify right side
    131.93x = 22,821.58
  5. Step 5: Solve for x
    x = 22,821.58/131.93
  6. Step 6: Final answer
    x = 172.99

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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.