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Finding the Fourth Proportional to 132.90, 200.18 and 122.87

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Solution

The fourth proportional to 132.90, 200.18 and 122.87 is: 185.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.90 : 200.18 = 122.87 : x
  2. Step 2: Convert to fraction form
    132.90/200.18 = 122.87/x
  3. Step 3: Cross multiply
    132.90x = 200.18 × 122.87
  4. Step 4: Simplify right side
    132.90x = 24,596.12
  5. Step 5: Solve for x
    x = 24,596.12/132.90
  6. Step 6: Final answer
    x = 185.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.