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Finding the Fourth Proportional to 139.51, 192.45 and 95.90

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Solution

The fourth proportional to 139.51, 192.45 and 95.90 is: 132.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.51 : 192.45 = 95.90 : x
  2. Step 2: Convert to fraction form
    139.51/192.45 = 95.90/x
  3. Step 3: Cross multiply
    139.51x = 192.45 × 95.90
  4. Step 4: Simplify right side
    139.51x = 18,455.96
  5. Step 5: Solve for x
    x = 18,455.96/139.51
  6. Step 6: Final answer
    x = 132.29

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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.