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Finding the Fourth Proportional to 137.65, 206.13 and 114.92

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Solution

The fourth proportional to 137.65, 206.13 and 114.92 is: 172.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.65 : 206.13 = 114.92 : x
  2. Step 2: Convert to fraction form
    137.65/206.13 = 114.92/x
  3. Step 3: Cross multiply
    137.65x = 206.13 × 114.92
  4. Step 4: Simplify right side
    137.65x = 23,688.57
  5. Step 5: Solve for x
    x = 23,688.57/137.65
  6. Step 6: Final answer
    x = 172.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.