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Finding the Fourth Proportional to 66,227.64, 99,331.74 and 21,855.48

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Solution

The fourth proportional to 66,227.64, 99,331.74 and 21,855.48 is: 32,780.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,227.64 : 99,331.74 = 21,855.48 : x
  2. Step 2: Convert to fraction form
    66,227.64/99,331.74 = 21,855.48/x
  3. Step 3: Cross multiply
    66,227.64x = 99,331.74 × 21,855.48
  4. Step 4: Simplify right side
    66,227.64x = 2,170,942,856.94
  5. Step 5: Solve for x
    x = 2,170,942,856.94/66,227.64
  6. Step 6: Final answer
    x = 32,780.01

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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.