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Finding the Fourth Proportional to 192.50, 265.47 and 122.48

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Solution

The fourth proportional to 192.50, 265.47 and 122.48 is: 168.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.50 : 265.47 = 122.48 : x
  2. Step 2: Convert to fraction form
    192.50/265.47 = 122.48/x
  3. Step 3: Cross multiply
    192.50x = 265.47 × 122.48
  4. Step 4: Simplify right side
    192.50x = 32,513.44
  5. Step 5: Solve for x
    x = 32,513.44/192.50
  6. Step 6: Final answer
    x = 168.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.