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Finding the Fourth Proportional to 156.32, 234.38 and 69.61

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Solution

The fourth proportional to 156.32, 234.38 and 69.61 is: 104.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.32 : 234.38 = 69.61 : x
  2. Step 2: Convert to fraction form
    156.32/234.38 = 69.61/x
  3. Step 3: Cross multiply
    156.32x = 234.38 × 69.61
  4. Step 4: Simplify right side
    156.32x = 16,313.67
  5. Step 5: Solve for x
    x = 16,313.67/156.32
  6. Step 6: Final answer
    x = 104.36

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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.