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Finding the Fourth Proportional to 66,223.70, 99,335.43 and 54,489.46

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Solution

The fourth proportional to 66,223.70, 99,335.43 and 54,489.46 is: 81,734.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,223.70 : 99,335.43 = 54,489.46 : x
  2. Step 2: Convert to fraction form
    66,223.70/99,335.43 = 54,489.46/x
  3. Step 3: Cross multiply
    66,223.70x = 99,335.43 × 54,489.46
  4. Step 4: Simplify right side
    66,223.70x = 5,412,733,939.57
  5. Step 5: Solve for x
    x = 5,412,733,939.57/66,223.70
  6. Step 6: Final answer
    x = 81,734.09

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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.