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Finding the Fourth Proportional to 137.70, 206.82 and 101.25

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Solution

The fourth proportional to 137.70, 206.82 and 101.25 is: 152.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.70 : 206.82 = 101.25 : x
  2. Step 2: Convert to fraction form
    137.70/206.82 = 101.25/x
  3. Step 3: Cross multiply
    137.70x = 206.82 × 101.25
  4. Step 4: Simplify right side
    137.70x = 20,940.53
  5. Step 5: Solve for x
    x = 20,940.53/137.70
  6. Step 6: Final answer
    x = 152.07

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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.