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Finding the Fourth Proportional to 160.84, 221.80 and 105.55

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Solution

The fourth proportional to 160.84, 221.80 and 105.55 is: 145.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.84 : 221.80 = 105.55 : x
  2. Step 2: Convert to fraction form
    160.84/221.80 = 105.55/x
  3. Step 3: Cross multiply
    160.84x = 221.80 × 105.55
  4. Step 4: Simplify right side
    160.84x = 23,410.99
  5. Step 5: Solve for x
    x = 23,410.99/160.84
  6. Step 6: Final answer
    x = 145.55

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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.