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Finding the Fourth Proportional to 378,034,891.80, 567,052,337.70 and 90,820,555.80

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Solution

The fourth proportional to 378,034,891.80, 567,052,337.70 and 90,820,555.80 is: 136,230,833.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,034,891.80 : 567,052,337.70 = 90,820,555.80 : x
  2. Step 2: Convert to fraction form
    378,034,891.80/567,052,337.70 = 90,820,555.80/x
  3. Step 3: Cross multiply
    378,034,891.80x = 567,052,337.70 × 90,820,555.80
  4. Step 4: Simplify right side
    378,034,891.80x = 51,500,008,477,603,296
  5. Step 5: Solve for x
    x = 51,500,008,477,603,296/378,034,891.80
  6. Step 6: Final answer
    x = 136,230,833.70

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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.