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Finding the Fourth Proportional to 66,698,764.69, 100,057,709.69 and 20,644,678.12

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Solution

The fourth proportional to 66,698,764.69, 100,057,709.69 and 20,644,678.12 is: 30,969,977.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,698,764.69 : 100,057,709.69 = 20,644,678.12 : x
  2. Step 2: Convert to fraction form
    66,698,764.69/100,057,709.69 = 20,644,678.12/x
  3. Step 3: Cross multiply
    66,698,764.69x = 100,057,709.69 × 20,644,678.12
  4. Step 4: Simplify right side
    66,698,764.69x = 2,065,659,209,944,331.25
  5. Step 5: Solve for x
    x = 2,065,659,209,944,331.25/66,698,764.69
  6. Step 6: Final answer
    x = 30,969,977.02

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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.