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Finding the Fourth Proportional to 156.49, 234.94 and 125.66

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Solution

The fourth proportional to 156.49, 234.94 and 125.66 is: 188.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.49 : 234.94 = 125.66 : x
  2. Step 2: Convert to fraction form
    156.49/234.94 = 125.66/x
  3. Step 3: Cross multiply
    156.49x = 234.94 × 125.66
  4. Step 4: Simplify right side
    156.49x = 29,520.76
  5. Step 5: Solve for x
    x = 29,520.76/156.49
  6. Step 6: Final answer
    x = 188.65

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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.