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Finding the Fourth Proportional to 70,865.92, 106,299.02 and 66,535.66

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Solution

The fourth proportional to 70,865.92, 106,299.02 and 66,535.66 is: 99,803.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,865.92 : 106,299.02 = 66,535.66 : x
  2. Step 2: Convert to fraction form
    70,865.92/106,299.02 = 66,535.66/x
  3. Step 3: Cross multiply
    70,865.92x = 106,299.02 × 66,535.66
  4. Step 4: Simplify right side
    70,865.92x = 7,072,675,453.05
  5. Step 5: Solve for x
    x = 7,072,675,453.05/70,865.92
  6. Step 6: Final answer
    x = 99,803.62

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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.