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Finding the Fourth Proportional to 140.96, 210.20 and 135.83

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Solution

The fourth proportional to 140.96, 210.20 and 135.83 is: 202.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.96 : 210.20 = 135.83 : x
  2. Step 2: Convert to fraction form
    140.96/210.20 = 135.83/x
  3. Step 3: Cross multiply
    140.96x = 210.20 × 135.83
  4. Step 4: Simplify right side
    140.96x = 28,552.16
  5. Step 5: Solve for x
    x = 28,552.16/140.96
  6. Step 6: Final answer
    x = 202.56

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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.