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Finding the Fourth Proportional to 101.10, 139.27 and 69.96

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Solution

The fourth proportional to 101.10, 139.27 and 69.96 is: 96.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.10 : 139.27 = 69.96 : x
  2. Step 2: Convert to fraction form
    101.10/139.27 = 69.96/x
  3. Step 3: Cross multiply
    101.10x = 139.27 × 69.96
  4. Step 4: Simplify right side
    101.10x = 9,742.93
  5. Step 5: Solve for x
    x = 9,742.93/101.10
  6. Step 6: Final answer
    x = 96.37

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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.