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Finding the Fourth Proportional to 137.92, 206.64 and 97.26

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Solution

The fourth proportional to 137.92, 206.64 and 97.26 is: 145.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.92 : 206.64 = 97.26 : x
  2. Step 2: Convert to fraction form
    137.92/206.64 = 97.26/x
  3. Step 3: Cross multiply
    137.92x = 206.64 × 97.26
  4. Step 4: Simplify right side
    137.92x = 20,097.81
  5. Step 5: Solve for x
    x = 20,097.81/137.92
  6. Step 6: Final answer
    x = 145.72

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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.