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Finding the Fourth Proportional to 66,882,965.72, 100,300,379.80 and 23,151,842.20

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Solution

The fourth proportional to 66,882,965.72, 100,300,379.80 and 23,151,842.20 is: 34,719,431.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,882,965.72 : 100,300,379.80 = 23,151,842.20 : x
  2. Step 2: Convert to fraction form
    66,882,965.72/100,300,379.80 = 23,151,842.20/x
  3. Step 3: Cross multiply
    66,882,965.72x = 100,300,379.80 × 23,151,842.20
  4. Step 4: Simplify right side
    66,882,965.72x = 2,322,138,565,729,667.50
  5. Step 5: Solve for x
    x = 2,322,138,565,729,667.50/66,882,965.72
  6. Step 6: Final answer
    x = 34,719,431.78

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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.