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Finding the Fourth Proportional to 156.15, 234.68 and 144.09

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Solution

The fourth proportional to 156.15, 234.68 and 144.09 is: 216.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.15 : 234.68 = 144.09 : x
  2. Step 2: Convert to fraction form
    156.15/234.68 = 144.09/x
  3. Step 3: Cross multiply
    156.15x = 234.68 × 144.09
  4. Step 4: Simplify right side
    156.15x = 33,814.32
  5. Step 5: Solve for x
    x = 33,814.32/156.15
  6. Step 6: Final answer
    x = 216.55

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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.