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Finding the Fourth Proportional to 131.79, 196.50 and 130.20

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Solution

The fourth proportional to 131.79, 196.50 and 130.20 is: 194.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.79 : 196.50 = 130.20 : x
  2. Step 2: Convert to fraction form
    131.79/196.50 = 130.20/x
  3. Step 3: Cross multiply
    131.79x = 196.50 × 130.20
  4. Step 4: Simplify right side
    131.79x = 25,584.30
  5. Step 5: Solve for x
    x = 25,584.30/131.79
  6. Step 6: Final answer
    x = 194.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.