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Finding the Fourth Proportional to 192.78, 265.68 and 169.16

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Solution

The fourth proportional to 192.78, 265.68 and 169.16 is: 233.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.78 : 265.68 = 169.16 : x
  2. Step 2: Convert to fraction form
    192.78/265.68 = 169.16/x
  3. Step 3: Cross multiply
    192.78x = 265.68 × 169.16
  4. Step 4: Simplify right side
    192.78x = 44,941.10
  5. Step 5: Solve for x
    x = 44,941.10/192.78
  6. Step 6: Final answer
    x = 233.12

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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.