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Finding the Fourth Proportional to 160.53, 221.76 and 128.13

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Solution

The fourth proportional to 160.53, 221.76 and 128.13 is: 177.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.53 : 221.76 = 128.13 : x
  2. Step 2: Convert to fraction form
    160.53/221.76 = 128.13/x
  3. Step 3: Cross multiply
    160.53x = 221.76 × 128.13
  4. Step 4: Simplify right side
    160.53x = 28,413
  5. Step 5: Solve for x
    x = 28,413/160.53
  6. Step 6: Final answer
    x = 177.00

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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.