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Finding the Fourth Proportional to 79,488,067.20, 119,232,100.80 and 70,978,012.80

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Solution

The fourth proportional to 79,488,067.20, 119,232,100.80 and 70,978,012.80 is: 106,467,019.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,488,067.20 : 119,232,100.80 = 70,978,012.80 : x
  2. Step 2: Convert to fraction form
    79,488,067.20/119,232,100.80 = 70,978,012.80/x
  3. Step 3: Cross multiply
    79,488,067.20x = 119,232,100.80 × 70,978,012.80
  4. Step 4: Simplify right side
    79,488,067.20x = 8,462,857,576,753,290
  5. Step 5: Solve for x
    x = 8,462,857,576,753,290/79,488,067.20
  6. Step 6: Final answer
    x = 106,467,019.20

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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.