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Finding the Fourth Proportional to 101.18, 139.61 and 73.49

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Solution

The fourth proportional to 101.18, 139.61 and 73.49 is: 101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.18 : 139.61 = 73.49 : x
  2. Step 2: Convert to fraction form
    101.18/139.61 = 73.49/x
  3. Step 3: Cross multiply
    101.18x = 139.61 × 73.49
  4. Step 4: Simplify right side
    101.18x = 10,258.87
  5. Step 5: Solve for x
    x = 10,258.87/101.18
  6. Step 6: Final answer
    x = 101.40

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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.