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Finding the Fourth Proportional to 101.39, 140.01 and 84.08

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Solution

The fourth proportional to 101.39, 140.01 and 84.08 is: 116.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.39 : 140.01 = 84.08 : x
  2. Step 2: Convert to fraction form
    101.39/140.01 = 84.08/x
  3. Step 3: Cross multiply
    101.39x = 140.01 × 84.08
  4. Step 4: Simplify right side
    101.39x = 11,771.34
  5. Step 5: Solve for x
    x = 11,771.34/101.39
  6. Step 6: Final answer
    x = 116.11

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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.