Home / 81,812,992.80-122,719,628.64-65,521,890.48

Finding the Fourth Proportional to 81,812,992.80, 122,719,628.64 and 65,521,890.48

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Solution

The fourth proportional to 81,812,992.80, 122,719,628.64 and 65,521,890.48 is: 98,282,947.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,812,992.80 : 122,719,628.64 = 65,521,890.48 : x
  2. Step 2: Convert to fraction form
    81,812,992.80/122,719,628.64 = 65,521,890.48/x
  3. Step 3: Cross multiply
    81,812,992.80x = 122,719,628.64 × 65,521,890.48
  4. Step 4: Simplify right side
    81,812,992.80x = 8,040,822,067,496,351
  5. Step 5: Solve for x
    x = 8,040,822,067,496,351/81,812,992.80
  6. Step 6: Final answer
    x = 98,282,947.39

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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.