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Finding the Fourth Proportional to 160.53, 221.56 and 90.58

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Solution

The fourth proportional to 160.53, 221.56 and 90.58 is: 125.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.53 : 221.56 = 90.58 : x
  2. Step 2: Convert to fraction form
    160.53/221.56 = 90.58/x
  3. Step 3: Cross multiply
    160.53x = 221.56 × 90.58
  4. Step 4: Simplify right side
    160.53x = 20,069.01
  5. Step 5: Solve for x
    x = 20,069.01/160.53
  6. Step 6: Final answer
    x = 125.02

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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.