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Finding the Fourth Proportional to 106.35, 146.78 and 62.68

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Solution

The fourth proportional to 106.35, 146.78 and 62.68 is: 86.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.35 : 146.78 = 62.68 : x
  2. Step 2: Convert to fraction form
    106.35/146.78 = 62.68/x
  3. Step 3: Cross multiply
    106.35x = 146.78 × 62.68
  4. Step 4: Simplify right side
    106.35x = 9,200.17
  5. Step 5: Solve for x
    x = 9,200.17/106.35
  6. Step 6: Final answer
    x = 86.51

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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.