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Finding the Fourth Proportional to 128,572.82, 192,889.80 and 53,651.33

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Solution

The fourth proportional to 128,572.82, 192,889.80 and 53,651.33 is: 80,489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,572.82 : 192,889.80 = 53,651.33 : x
  2. Step 2: Convert to fraction form
    128,572.82/192,889.80 = 53,651.33/x
  3. Step 3: Cross multiply
    128,572.82x = 192,889.80 × 53,651.33
  4. Step 4: Simplify right side
    128,572.82x = 10,348,793,348.99
  5. Step 5: Solve for x
    x = 10,348,793,348.99/128,572.82
  6. Step 6: Final answer
    x = 80,489.75

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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.