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Finding the Fourth Proportional to 131.88, 198.78 and 124.02

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Solution

The fourth proportional to 131.88, 198.78 and 124.02 is: 186.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.88 : 198.78 = 124.02 : x
  2. Step 2: Convert to fraction form
    131.88/198.78 = 124.02/x
  3. Step 3: Cross multiply
    131.88x = 198.78 × 124.02
  4. Step 4: Simplify right side
    131.88x = 24,652.70
  5. Step 5: Solve for x
    x = 24,652.70/131.88
  6. Step 6: Final answer
    x = 186.93

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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.