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Finding the Fourth Proportional to 101.17, 140.27 and 97.80

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Solution

The fourth proportional to 101.17, 140.27 and 97.80 is: 135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.17 : 140.27 = 97.80 : x
  2. Step 2: Convert to fraction form
    101.17/140.27 = 97.80/x
  3. Step 3: Cross multiply
    101.17x = 140.27 × 97.80
  4. Step 4: Simplify right side
    101.17x = 13,718.41
  5. Step 5: Solve for x
    x = 13,718.41/101.17
  6. Step 6: Final answer
    x = 135.60

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.