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Finding the Fourth Proportional to 128,600.73, 192,869.91 and 53,680.28

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Solution

The fourth proportional to 128,600.73, 192,869.91 and 53,680.28 is: 80,507.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.73 : 192,869.91 = 53,680.28 : x
  2. Step 2: Convert to fraction form
    128,600.73/192,869.91 = 53,680.28/x
  3. Step 3: Cross multiply
    128,600.73x = 192,869.91 × 53,680.28
  4. Step 4: Simplify right side
    128,600.73x = 10,353,309,808.03
  5. Step 5: Solve for x
    x = 10,353,309,808.03/128,600.73
  6. Step 6: Final answer
    x = 80,507.40

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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.