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Finding the Fourth Proportional to 192,538.60, 288,654.30 and 81,639.40

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Solution

The fourth proportional to 192,538.60, 288,654.30 and 81,639.40 is: 122,393.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,538.60 : 288,654.30 = 81,639.40 : x
  2. Step 2: Convert to fraction form
    192,538.60/288,654.30 = 81,639.40/x
  3. Step 3: Cross multiply
    192,538.60x = 288,654.30 × 81,639.40
  4. Step 4: Simplify right side
    192,538.60x = 23,565,563,859.42
  5. Step 5: Solve for x
    x = 23,565,563,859.42/192,538.60
  6. Step 6: Final answer
    x = 122,393.97

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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.