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Finding the Fourth Proportional to 191.99, 264.93 and 113.31

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Solution

The fourth proportional to 191.99, 264.93 and 113.31 is: 156.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.99 : 264.93 = 113.31 : x
  2. Step 2: Convert to fraction form
    191.99/264.93 = 113.31/x
  3. Step 3: Cross multiply
    191.99x = 264.93 × 113.31
  4. Step 4: Simplify right side
    191.99x = 30,019.22
  5. Step 5: Solve for x
    x = 30,019.22/191.99
  6. Step 6: Final answer
    x = 156.36

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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.