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Finding the Fourth Proportional to 156.44, 234.54 and 65.21

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Solution

The fourth proportional to 156.44, 234.54 and 65.21 is: 97.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.44 : 234.54 = 65.21 : x
  2. Step 2: Convert to fraction form
    156.44/234.54 = 65.21/x
  3. Step 3: Cross multiply
    156.44x = 234.54 × 65.21
  4. Step 4: Simplify right side
    156.44x = 15,293.66
  5. Step 5: Solve for x
    x = 15,293.66/156.44
  6. Step 6: Final answer
    x = 97.76

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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.