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Finding the Fourth Proportional to 192.91, 289.32 and 90.16

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Solution

The fourth proportional to 192.91, 289.32 and 90.16 is: 135.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.91 : 289.32 = 90.16 : x
  2. Step 2: Convert to fraction form
    192.91/289.32 = 90.16/x
  3. Step 3: Cross multiply
    192.91x = 289.32 × 90.16
  4. Step 4: Simplify right side
    192.91x = 26,086.16
  5. Step 5: Solve for x
    x = 26,086.16/192.91
  6. Step 6: Final answer
    x = 135.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.