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Finding the Fourth Proportional to 190,659.79, 285,819.74 and 72,414.17

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Solution

The fourth proportional to 190,659.79, 285,819.74 and 72,414.17 is: 108,556.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,659.79 : 285,819.74 = 72,414.17 : x
  2. Step 2: Convert to fraction form
    190,659.79/285,819.74 = 72,414.17/x
  3. Step 3: Cross multiply
    190,659.79x = 285,819.74 × 72,414.17
  4. Step 4: Simplify right side
    190,659.79x = 20,697,398,793.92
  5. Step 5: Solve for x
    x = 20,697,398,793.92/190,659.79
  6. Step 6: Final answer
    x = 108,556.71

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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.