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Finding the Fourth Proportional to 156.15, 234.21 and 64.83

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Solution

The fourth proportional to 156.15, 234.21 and 64.83 is: 97.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.15 : 234.21 = 64.83 : x
  2. Step 2: Convert to fraction form
    156.15/234.21 = 64.83/x
  3. Step 3: Cross multiply
    156.15x = 234.21 × 64.83
  4. Step 4: Simplify right side
    156.15x = 15,183.83
  5. Step 5: Solve for x
    x = 15,183.83/156.15
  6. Step 6: Final answer
    x = 97.24

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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.