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Finding the Fourth Proportional to 70.04, 96.65 and 38.96

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Solution

The fourth proportional to 70.04, 96.65 and 38.96 is: 53.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.04 : 96.65 = 38.96 : x
  2. Step 2: Convert to fraction form
    70.04/96.65 = 38.96/x
  3. Step 3: Cross multiply
    70.04x = 96.65 × 38.96
  4. Step 4: Simplify right side
    70.04x = 3,765.21
  5. Step 5: Solve for x
    x = 3,765.21/70.04
  6. Step 6: Final answer
    x = 53.76

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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.