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Finding the Fourth Proportional to 251,991,100.80, 377,986,651.20 and 79,485,352.20

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Solution

The fourth proportional to 251,991,100.80, 377,986,651.20 and 79,485,352.20 is: 119,228,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,991,100.80 : 377,986,651.20 = 79,485,352.20 : x
  2. Step 2: Convert to fraction form
    251,991,100.80/377,986,651.20 = 79,485,352.20/x
  3. Step 3: Cross multiply
    251,991,100.80x = 377,986,651.20 × 79,485,352.20
  4. Step 4: Simplify right side
    251,991,100.80x = 30,044,402,097,530,552
  5. Step 5: Solve for x
    x = 30,044,402,097,530,552/251,991,100.80
  6. Step 6: Final answer
    x = 119,228,028.30

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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.