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Finding the Fourth Proportional to 391,987,343.80, 587,981,015.70 and 104,773,007.80

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Solution

The fourth proportional to 391,987,343.80, 587,981,015.70 and 104,773,007.80 is: 157,159,511.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,987,343.80 : 587,981,015.70 = 104,773,007.80 : x
  2. Step 2: Convert to fraction form
    391,987,343.80/587,981,015.70 = 104,773,007.80/x
  3. Step 3: Cross multiply
    391,987,343.80x = 587,981,015.70 × 104,773,007.80
  4. Step 4: Simplify right side
    391,987,343.80x = 61,604,539,544,188,024
  5. Step 5: Solve for x
    x = 61,604,539,544,188,024/391,987,343.80
  6. Step 6: Final answer
    x = 157,159,511.70

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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.