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Finding the Fourth Proportional to 101.45, 140.07 and 73.85

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Solution

The fourth proportional to 101.45, 140.07 and 73.85 is: 101.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.45 : 140.07 = 73.85 : x
  2. Step 2: Convert to fraction form
    101.45/140.07 = 73.85/x
  3. Step 3: Cross multiply
    101.45x = 140.07 × 73.85
  4. Step 4: Simplify right side
    101.45x = 10,344.17
  5. Step 5: Solve for x
    x = 10,344.17/101.45
  6. Step 6: Final answer
    x = 101.96

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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.