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Finding the Fourth Proportional to 192.93, 289.40 and 71.19

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Solution

The fourth proportional to 192.93, 289.40 and 71.19 is: 106.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.93 : 289.40 = 71.19 : x
  2. Step 2: Convert to fraction form
    192.93/289.40 = 71.19/x
  3. Step 3: Cross multiply
    192.93x = 289.40 × 71.19
  4. Step 4: Simplify right side
    192.93x = 20,602.03
  5. Step 5: Solve for x
    x = 20,602.03/192.93
  6. Step 6: Final answer
    x = 106.79

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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.