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Finding the Fourth Proportional to 156.35, 234.43 and 69.73

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Solution

The fourth proportional to 156.35, 234.43 and 69.73 is: 104.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.35 : 234.43 = 69.73 : x
  2. Step 2: Convert to fraction form
    156.35/234.43 = 69.73/x
  3. Step 3: Cross multiply
    156.35x = 234.43 × 69.73
  4. Step 4: Simplify right side
    156.35x = 16,346.04
  5. Step 5: Solve for x
    x = 16,346.04/156.35
  6. Step 6: Final answer
    x = 104.55

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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.