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Finding the Fourth Proportional to 192.21, 265.13 and 113.49

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Solution

The fourth proportional to 192.21, 265.13 and 113.49 is: 156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.21 : 265.13 = 113.49 : x
  2. Step 2: Convert to fraction form
    192.21/265.13 = 113.49/x
  3. Step 3: Cross multiply
    192.21x = 265.13 × 113.49
  4. Step 4: Simplify right side
    192.21x = 30,089.46
  5. Step 5: Solve for x
    x = 30,089.46/192.21
  6. Step 6: Final answer
    x = 156.55

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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.