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Finding the Fourth Proportional to 106.39, 159.50 and 52.25

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Solution

The fourth proportional to 106.39, 159.50 and 52.25 is: 78.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.39 : 159.50 = 52.25 : x
  2. Step 2: Convert to fraction form
    106.39/159.50 = 52.25/x
  3. Step 3: Cross multiply
    106.39x = 159.50 × 52.25
  4. Step 4: Simplify right side
    106.39x = 8,333.21
  5. Step 5: Solve for x
    x = 8,333.21/106.39
  6. Step 6: Final answer
    x = 78.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.