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Finding the Fourth Proportional to 70.71, 97.57 and 39.62

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Solution

The fourth proportional to 70.71, 97.57 and 39.62 is: 54.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.71 : 97.57 = 39.62 : x
  2. Step 2: Convert to fraction form
    70.71/97.57 = 39.62/x
  3. Step 3: Cross multiply
    70.71x = 97.57 × 39.62
  4. Step 4: Simplify right side
    70.71x = 3,865.72
  5. Step 5: Solve for x
    x = 3,865.72/70.71
  6. Step 6: Final answer
    x = 54.67

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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.