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Finding the Fourth Proportional to 191.75, 264.63 and 107.74

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Solution

The fourth proportional to 191.75, 264.63 and 107.74 is: 148.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.75 : 264.63 = 107.74 : x
  2. Step 2: Convert to fraction form
    191.75/264.63 = 107.74/x
  3. Step 3: Cross multiply
    191.75x = 264.63 × 107.74
  4. Step 4: Simplify right side
    191.75x = 28,509.37
  5. Step 5: Solve for x
    x = 28,509.37/191.75
  6. Step 6: Final answer
    x = 148.68

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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.