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Finding the Fourth Proportional to 101.16, 140.45 and 98.19

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Solution

The fourth proportional to 101.16, 140.45 and 98.19 is: 136.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.16 : 140.45 = 98.19 : x
  2. Step 2: Convert to fraction form
    101.16/140.45 = 98.19/x
  3. Step 3: Cross multiply
    101.16x = 140.45 × 98.19
  4. Step 4: Simplify right side
    101.16x = 13,790.29
  5. Step 5: Solve for x
    x = 13,790.29/101.16
  6. Step 6: Final answer
    x = 136.32

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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.