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Finding the Fourth Proportional to 140.34, 209.70 and 107.22

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Solution

The fourth proportional to 140.34, 209.70 and 107.22 is: 160.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.34 : 209.70 = 107.22 : x
  2. Step 2: Convert to fraction form
    140.34/209.70 = 107.22/x
  3. Step 3: Cross multiply
    140.34x = 209.70 × 107.22
  4. Step 4: Simplify right side
    140.34x = 22,483.65
  5. Step 5: Solve for x
    x = 22,483.65/140.34
  6. Step 6: Final answer
    x = 160.20

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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.