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Finding the Fourth Proportional to 101.98, 140.76 and 69.23

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Solution

The fourth proportional to 101.98, 140.76 and 69.23 is: 95.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.98 : 140.76 = 69.23 : x
  2. Step 2: Convert to fraction form
    101.98/140.76 = 69.23/x
  3. Step 3: Cross multiply
    101.98x = 140.76 × 69.23
  4. Step 4: Simplify right side
    101.98x = 9,744.81
  5. Step 5: Solve for x
    x = 9,744.81/101.98
  6. Step 6: Final answer
    x = 95.56

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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.