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Finding the Fourth Proportional to 106.40, 158.97 and 65.49

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Solution

The fourth proportional to 106.40, 158.97 and 65.49 is: 97.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.40 : 158.97 = 65.49 : x
  2. Step 2: Convert to fraction form
    106.40/158.97 = 65.49/x
  3. Step 3: Cross multiply
    106.40x = 158.97 × 65.49
  4. Step 4: Simplify right side
    106.40x = 10,410.95
  5. Step 5: Solve for x
    x = 10,410.95/106.40
  6. Step 6: Final answer
    x = 97.85

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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.