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Finding the Fourth Proportional to 191.58, 264.38 and 108.69

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Solution

The fourth proportional to 191.58, 264.38 and 108.69 is: 149.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.58 : 264.38 = 108.69 : x
  2. Step 2: Convert to fraction form
    191.58/264.38 = 108.69/x
  3. Step 3: Cross multiply
    191.58x = 264.38 × 108.69
  4. Step 4: Simplify right side
    191.58x = 28,733.93
  5. Step 5: Solve for x
    x = 28,733.93/191.58
  6. Step 6: Final answer
    x = 149.99

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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.