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Finding the Fourth Proportional to 192,772.80, 289,103.60 and 66,407.92

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Solution

The fourth proportional to 192,772.80, 289,103.60 and 66,407.92 is: 99,592.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,772.80 : 289,103.60 = 66,407.92 : x
  2. Step 2: Convert to fraction form
    192,772.80/289,103.60 = 66,407.92/x
  3. Step 3: Cross multiply
    192,772.80x = 289,103.60 × 66,407.92
  4. Step 4: Simplify right side
    192,772.80x = 19,198,768,740.51
  5. Step 5: Solve for x
    x = 19,198,768,740.51/192,772.80
  6. Step 6: Final answer
    x = 99,592.73

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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.