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Finding the Fourth Proportional to 192.49, 288.67 and 70.72

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Solution

The fourth proportional to 192.49, 288.67 and 70.72 is: 106.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.49 : 288.67 = 70.72 : x
  2. Step 2: Convert to fraction form
    192.49/288.67 = 70.72/x
  3. Step 3: Cross multiply
    192.49x = 288.67 × 70.72
  4. Step 4: Simplify right side
    192.49x = 20,414.39
  5. Step 5: Solve for x
    x = 20,414.39/192.49
  6. Step 6: Final answer
    x = 106.05

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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.