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Finding the Fourth Proportional to 66,647.80, 99,933.90 and 27,158.68

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Solution

The fourth proportional to 66,647.80, 99,933.90 and 27,158.68 is: 40,722.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,647.80 : 99,933.90 = 27,158.68 : x
  2. Step 2: Convert to fraction form
    66,647.80/99,933.90 = 27,158.68/x
  3. Step 3: Cross multiply
    66,647.80x = 99,933.90 × 27,158.68
  4. Step 4: Simplify right side
    66,647.80x = 2,714,072,811.25
  5. Step 5: Solve for x
    x = 2,714,072,811.25/66,647.80
  6. Step 6: Final answer
    x = 40,722.62

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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.