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Finding the Fourth Proportional to 160.40, 221.29 and 107.98

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Solution

The fourth proportional to 160.40, 221.29 and 107.98 is: 148.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.40 : 221.29 = 107.98 : x
  2. Step 2: Convert to fraction form
    160.40/221.29 = 107.98/x
  3. Step 3: Cross multiply
    160.40x = 221.29 × 107.98
  4. Step 4: Simplify right side
    160.40x = 23,894.89
  5. Step 5: Solve for x
    x = 23,894.89/160.40
  6. Step 6: Final answer
    x = 148.97

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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.