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Finding the Fourth Proportional to 191.03, 263.49 and 117.25

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Solution

The fourth proportional to 191.03, 263.49 and 117.25 is: 161.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.03 : 263.49 = 117.25 : x
  2. Step 2: Convert to fraction form
    191.03/263.49 = 117.25/x
  3. Step 3: Cross multiply
    191.03x = 263.49 × 117.25
  4. Step 4: Simplify right side
    191.03x = 30,893.10
  5. Step 5: Solve for x
    x = 30,893.10/191.03
  6. Step 6: Final answer
    x = 161.72

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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.