Home / 81,330,604.80-121,995,129.60-19,920,033.60

Finding the Fourth Proportional to 81,330,604.80, 121,995,129.60 and 19,920,033.60

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Solution

The fourth proportional to 81,330,604.80, 121,995,129.60 and 19,920,033.60 is: 29,879,859.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,330,604.80 : 121,995,129.60 = 19,920,033.60 : x
  2. Step 2: Convert to fraction form
    81,330,604.80/121,995,129.60 = 19,920,033.60/x
  3. Step 3: Cross multiply
    81,330,604.80x = 121,995,129.60 × 19,920,033.60
  4. Step 4: Simplify right side
    81,330,604.80x = 2,430,147,080,668,354.50
  5. Step 5: Solve for x
    x = 2,430,147,080,668,354.50/81,330,604.80
  6. Step 6: Final answer
    x = 29,879,859.95

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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.