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Finding the Fourth Proportional to 192.72, 265.86 and 117.97

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Solution

The fourth proportional to 192.72, 265.86 and 117.97 is: 162.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.72 : 265.86 = 117.97 : x
  2. Step 2: Convert to fraction form
    192.72/265.86 = 117.97/x
  3. Step 3: Cross multiply
    192.72x = 265.86 × 117.97
  4. Step 4: Simplify right side
    192.72x = 31,363.13
  5. Step 5: Solve for x
    x = 31,363.13/192.72
  6. Step 6: Final answer
    x = 162.74

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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.