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Finding the Fourth Proportional to 139.78, 192.87 and 96.10

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Solution

The fourth proportional to 139.78, 192.87 and 96.10 is: 132.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.78 : 192.87 = 96.10 : x
  2. Step 2: Convert to fraction form
    139.78/192.87 = 96.10/x
  3. Step 3: Cross multiply
    139.78x = 192.87 × 96.10
  4. Step 4: Simplify right side
    139.78x = 18,534.81
  5. Step 5: Solve for x
    x = 18,534.81/139.78
  6. Step 6: Final answer
    x = 132.60

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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.