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Finding the Fourth Proportional to 156.42, 234.63 and 92.25

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Solution

The fourth proportional to 156.42, 234.63 and 92.25 is: 138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.42 : 234.63 = 92.25 : x
  2. Step 2: Convert to fraction form
    156.42/234.63 = 92.25/x
  3. Step 3: Cross multiply
    156.42x = 234.63 × 92.25
  4. Step 4: Simplify right side
    156.42x = 21,644.62
  5. Step 5: Solve for x
    x = 21,644.62/156.42
  6. Step 6: Final answer
    x = 138.38

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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.