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Finding the Fourth Proportional to 128,581.56, 192,903.12 and 53,660.04

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Solution

The fourth proportional to 128,581.56, 192,903.12 and 53,660.04 is: 80,502.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,581.56 : 192,903.12 = 53,660.04 : x
  2. Step 2: Convert to fraction form
    128,581.56/192,903.12 = 53,660.04/x
  3. Step 3: Cross multiply
    128,581.56x = 192,903.12 × 53,660.04
  4. Step 4: Simplify right side
    128,581.56x = 10,351,189,135.32
  5. Step 5: Solve for x
    x = 10,351,189,135.32/128,581.56
  6. Step 6: Final answer
    x = 80,502.91

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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.