Home / 81,192,449.70-121,788,674.55-20,608,175.70

Finding the Fourth Proportional to 81,192,449.70, 121,788,674.55 and 20,608,175.70

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Solution

The fourth proportional to 81,192,449.70, 121,788,674.55 and 20,608,175.70 is: 30,912,263.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,192,449.70 : 121,788,674.55 = 20,608,175.70 : x
  2. Step 2: Convert to fraction form
    81,192,449.70/121,788,674.55 = 20,608,175.70/x
  3. Step 3: Cross multiply
    81,192,449.70x = 121,788,674.55 × 20,608,175.70
  4. Step 4: Simplify right side
    81,192,449.70x = 2,509,842,403,396,518.50
  5. Step 5: Solve for x
    x = 2,509,842,403,396,518.50/81,192,449.70
  6. Step 6: Final answer
    x = 30,912,263.55

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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.