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Finding the Fourth Proportional to 192.96, 266.40 and 124.16

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Solution

The fourth proportional to 192.96, 266.40 and 124.16 is: 171.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.96 : 266.40 = 124.16 : x
  2. Step 2: Convert to fraction form
    192.96/266.40 = 124.16/x
  3. Step 3: Cross multiply
    192.96x = 266.40 × 124.16
  4. Step 4: Simplify right side
    192.96x = 33,076.22
  5. Step 5: Solve for x
    x = 33,076.22/192.96
  6. Step 6: Final answer
    x = 171.41

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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.