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Finding the Fourth Proportional to 139.02, 191.96 and 97.65

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Solution

The fourth proportional to 139.02, 191.96 and 97.65 is: 134.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.02 : 191.96 = 97.65 : x
  2. Step 2: Convert to fraction form
    139.02/191.96 = 97.65/x
  3. Step 3: Cross multiply
    139.02x = 191.96 × 97.65
  4. Step 4: Simplify right side
    139.02x = 18,744.89
  5. Step 5: Solve for x
    x = 18,744.89/139.02
  6. Step 6: Final answer
    x = 134.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.