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Finding the Fourth Proportional to 160.67, 221.79 and 98.51

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Solution

The fourth proportional to 160.67, 221.79 and 98.51 is: 135.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.67 : 221.79 = 98.51 : x
  2. Step 2: Convert to fraction form
    160.67/221.79 = 98.51/x
  3. Step 3: Cross multiply
    160.67x = 221.79 × 98.51
  4. Step 4: Simplify right side
    160.67x = 21,847.42
  5. Step 5: Solve for x
    x = 21,847.42/160.67
  6. Step 6: Final answer
    x = 135.98

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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.