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Finding the Fourth Proportional to 156.67, 216.11 and 101.35

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Solution

The fourth proportional to 156.67, 216.11 and 101.35 is: 139.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.67 : 216.11 = 101.35 : x
  2. Step 2: Convert to fraction form
    156.67/216.11 = 101.35/x
  3. Step 3: Cross multiply
    156.67x = 216.11 × 101.35
  4. Step 4: Simplify right side
    156.67x = 21,902.75
  5. Step 5: Solve for x
    x = 21,902.75/156.67
  6. Step 6: Final answer
    x = 139.80

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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.