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Finding the Fourth Proportional to 160.61, 221.66 and 98.46

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Solution

The fourth proportional to 160.61, 221.66 and 98.46 is: 135.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.61 : 221.66 = 98.46 : x
  2. Step 2: Convert to fraction form
    160.61/221.66 = 98.46/x
  3. Step 3: Cross multiply
    160.61x = 221.66 × 98.46
  4. Step 4: Simplify right side
    160.61x = 21,824.64
  5. Step 5: Solve for x
    x = 21,824.64/160.61
  6. Step 6: Final answer
    x = 135.89

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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.