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Finding the Fourth Proportional to 140.40, 193.46 and 118.53

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Solution

The fourth proportional to 140.40, 193.46 and 118.53 is: 163.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.40 : 193.46 = 118.53 : x
  2. Step 2: Convert to fraction form
    140.40/193.46 = 118.53/x
  3. Step 3: Cross multiply
    140.40x = 193.46 × 118.53
  4. Step 4: Simplify right side
    140.40x = 22,930.22
  5. Step 5: Solve for x
    x = 22,930.22/140.40
  6. Step 6: Final answer
    x = 163.32

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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.