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Finding the Fourth Proportional to 102.09, 140.97 and 69.41

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Solution

The fourth proportional to 102.09, 140.97 and 69.41 is: 95.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.09 : 140.97 = 69.41 : x
  2. Step 2: Convert to fraction form
    102.09/140.97 = 69.41/x
  3. Step 3: Cross multiply
    102.09x = 140.97 × 69.41
  4. Step 4: Simplify right side
    102.09x = 9,784.02
  5. Step 5: Solve for x
    x = 9,784.02/102.09
  6. Step 6: Final answer
    x = 95.84

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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.