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Finding the Fourth Proportional to 156.27, 234.61 and 84.18

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Solution

The fourth proportional to 156.27, 234.61 and 84.18 is: 126.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.27 : 234.61 = 84.18 : x
  2. Step 2: Convert to fraction form
    156.27/234.61 = 84.18/x
  3. Step 3: Cross multiply
    156.27x = 234.61 × 84.18
  4. Step 4: Simplify right side
    156.27x = 19,749.26
  5. Step 5: Solve for x
    x = 19,749.26/156.27
  6. Step 6: Final answer
    x = 126.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.