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Finding the Fourth Proportional to 131.49, 196.29 and 104.40

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Solution

The fourth proportional to 131.49, 196.29 and 104.40 is: 155.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.49 : 196.29 = 104.40 : x
  2. Step 2: Convert to fraction form
    131.49/196.29 = 104.40/x
  3. Step 3: Cross multiply
    131.49x = 196.29 × 104.40
  4. Step 4: Simplify right side
    131.49x = 20,492.68
  5. Step 5: Solve for x
    x = 20,492.68/131.49
  6. Step 6: Final answer
    x = 155.85

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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.