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Finding the Fourth Proportional to 128,446.92, 192,493.98 and 72,313.56

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Solution

The fourth proportional to 128,446.92, 192,493.98 and 72,313.56 is: 108,371.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,446.92 : 192,493.98 = 72,313.56 : x
  2. Step 2: Convert to fraction form
    128,446.92/192,493.98 = 72,313.56/x
  3. Step 3: Cross multiply
    128,446.92x = 192,493.98 × 72,313.56
  4. Step 4: Simplify right side
    128,446.92x = 13,919,924,972.37
  5. Step 5: Solve for x
    x = 13,919,924,972.37/128,446.92
  6. Step 6: Final answer
    x = 108,371.03

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1.5x scale

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.