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Finding the Fourth Proportional to 160.94, 222 and 128.18

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Solution

The fourth proportional to 160.94, 222 and 128.18 is: 176.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.94 : 222 = 128.18 : x
  2. Step 2: Convert to fraction form
    160.94/222 = 128.18/x
  3. Step 3: Cross multiply
    160.94x = 222 × 128.18
  4. Step 4: Simplify right side
    160.94x = 28,455.96
  5. Step 5: Solve for x
    x = 28,455.96/160.94
  6. Step 6: Final answer
    x = 176.81

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1.5x scale

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.