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Finding the Fourth Proportional to 140.74, 209.63 and 135.25

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Solution

The fourth proportional to 140.74, 209.63 and 135.25 is: 201.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.74 : 209.63 = 135.25 : x
  2. Step 2: Convert to fraction form
    140.74/209.63 = 135.25/x
  3. Step 3: Cross multiply
    140.74x = 209.63 × 135.25
  4. Step 4: Simplify right side
    140.74x = 28,352.46
  5. Step 5: Solve for x
    x = 28,352.46/140.74
  6. Step 6: Final answer
    x = 201.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.