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Finding the Fourth Proportional to 139,472.36, 192,471.13 and 75,810.50

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Solution

The fourth proportional to 139,472.36, 192,471.13 and 75,810.50 is: 104,618.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,472.36 : 192,471.13 = 75,810.50 : x
  2. Step 2: Convert to fraction form
    139,472.36/192,471.13 = 75,810.50/x
  3. Step 3: Cross multiply
    139,472.36x = 192,471.13 × 75,810.50
  4. Step 4: Simplify right side
    139,472.36x = 14,591,332,600.87
  5. Step 5: Solve for x
    x = 14,591,332,600.87/139,472.36
  6. Step 6: Final answer
    x = 104,618.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.