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Finding the Fourth Proportional to 192.71, 289.24 and 90.14

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Solution

The fourth proportional to 192.71, 289.24 and 90.14 is: 135.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.71 : 289.24 = 90.14 : x
  2. Step 2: Convert to fraction form
    192.71/289.24 = 90.14/x
  3. Step 3: Cross multiply
    192.71x = 289.24 × 90.14
  4. Step 4: Simplify right side
    192.71x = 26,070.42
  5. Step 5: Solve for x
    x = 26,070.42/192.71
  6. Step 6: Final answer
    x = 135.28

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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.