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Finding the Fourth Proportional to 128,492.48, 192,738.72 and 53,647.94

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Solution

The fourth proportional to 128,492.48, 192,738.72 and 53,647.94 is: 80,471.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,492.48 : 192,738.72 = 53,647.94 : x
  2. Step 2: Convert to fraction form
    128,492.48/192,738.72 = 53,647.94/x
  3. Step 3: Cross multiply
    128,492.48x = 192,738.72 × 53,647.94
  4. Step 4: Simplify right side
    128,492.48x = 10,340,035,286.24
  5. Step 5: Solve for x
    x = 10,340,035,286.24/128,492.48
  6. Step 6: Final answer
    x = 80,471.91

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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.