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Finding the Fourth Proportional to 106.47, 146.97 and 71.55

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Solution

The fourth proportional to 106.47, 146.97 and 71.55 is: 98.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.47 : 146.97 = 71.55 : x
  2. Step 2: Convert to fraction form
    106.47/146.97 = 71.55/x
  3. Step 3: Cross multiply
    106.47x = 146.97 × 71.55
  4. Step 4: Simplify right side
    106.47x = 10,515.70
  5. Step 5: Solve for x
    x = 10,515.70/106.47
  6. Step 6: Final answer
    x = 98.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.