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Finding the Fourth Proportional to 191.21, 263.94 and 142.00

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Solution

The fourth proportional to 191.21, 263.94 and 142.00 is: 196.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.21 : 263.94 = 142.00 : x
  2. Step 2: Convert to fraction form
    191.21/263.94 = 142.00/x
  3. Step 3: Cross multiply
    191.21x = 263.94 × 142.00
  4. Step 4: Simplify right side
    191.21x = 37,479.09
  5. Step 5: Solve for x
    x = 37,479.09/191.21
  6. Step 6: Final answer
    x = 196.02

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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.