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Finding the Fourth Proportional to 156.15, 234.33 and 69.48

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Solution

The fourth proportional to 156.15, 234.33 and 69.48 is: 104.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.15 : 234.33 = 69.48 : x
  2. Step 2: Convert to fraction form
    156.15/234.33 = 69.48/x
  3. Step 3: Cross multiply
    156.15x = 234.33 × 69.48
  4. Step 4: Simplify right side
    156.15x = 16,281.25
  5. Step 5: Solve for x
    x = 16,281.25/156.15
  6. Step 6: Final answer
    x = 104.27

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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.