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Finding the Fourth Proportional to 139.65, 192.96 and 136.01

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Solution

The fourth proportional to 139.65, 192.96 and 136.01 is: 187.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.65 : 192.96 = 136.01 : x
  2. Step 2: Convert to fraction form
    139.65/192.96 = 136.01/x
  3. Step 3: Cross multiply
    139.65x = 192.96 × 136.01
  4. Step 4: Simplify right side
    139.65x = 26,243.52
  5. Step 5: Solve for x
    x = 26,243.52/139.65
  6. Step 6: Final answer
    x = 187.92

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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.