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Finding the Fourth Proportional to 69,821,380.80, 104,779,310.40 and 31,463,150.40

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Solution

The fourth proportional to 69,821,380.80, 104,779,310.40 and 31,463,150.40 is: 47,216,012.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,821,380.80 : 104,779,310.40 = 31,463,150.40 : x
  2. Step 2: Convert to fraction form
    69,821,380.80/104,779,310.40 = 31,463,150.40/x
  3. Step 3: Cross multiply
    69,821,380.80x = 104,779,310.40 × 31,463,150.40
  4. Step 4: Simplify right side
    69,821,380.80x = 3,296,687,201,923,484
  5. Step 5: Solve for x
    x = 3,296,687,201,923,484/69,821,380.80
  6. Step 6: Final answer
    x = 47,216,012.69

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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.