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Finding the Fourth Proportional to 70.72, 106.10 and 36.49

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Solution

The fourth proportional to 70.72, 106.10 and 36.49 is: 54.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.72 : 106.10 = 36.49 : x
  2. Step 2: Convert to fraction form
    70.72/106.10 = 36.49/x
  3. Step 3: Cross multiply
    70.72x = 106.10 × 36.49
  4. Step 4: Simplify right side
    70.72x = 3,871.59
  5. Step 5: Solve for x
    x = 3,871.59/70.72
  6. Step 6: Final answer
    x = 54.75

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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.