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Finding the Fourth Proportional to 70.57, 106.22 and 53.54

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Solution

The fourth proportional to 70.57, 106.22 and 53.54 is: 80.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.57 : 106.22 = 53.54 : x
  2. Step 2: Convert to fraction form
    70.57/106.22 = 53.54/x
  3. Step 3: Cross multiply
    70.57x = 106.22 × 53.54
  4. Step 4: Simplify right side
    70.57x = 5,687.02
  5. Step 5: Solve for x
    x = 5,687.02/70.57
  6. Step 6: Final answer
    x = 80.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.