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Finding the Fourth Proportional to 156.82, 216.66 and 109.67

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Solution

The fourth proportional to 156.82, 216.66 and 109.67 is: 151.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.82 : 216.66 = 109.67 : x
  2. Step 2: Convert to fraction form
    156.82/216.66 = 109.67/x
  3. Step 3: Cross multiply
    156.82x = 216.66 × 109.67
  4. Step 4: Simplify right side
    156.82x = 23,761.10
  5. Step 5: Solve for x
    x = 23,761.10/156.82
  6. Step 6: Final answer
    x = 151.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.