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Finding the Fourth Proportional to 68,990,003.80, 103,556,783.07 and 50,814,721.60

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Solution

The fourth proportional to 68,990,003.80, 103,556,783.07 and 50,814,721.60 is: 76,274,950.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990,003.80 : 103,556,783.07 = 50,814,721.60 : x
  2. Step 2: Convert to fraction form
    68,990,003.80/103,556,783.07 = 50,814,721.60/x
  3. Step 3: Cross multiply
    68,990,003.80x = 103,556,783.07 × 50,814,721.60
  4. Step 4: Simplify right side
    68,990,003.80x = 5,262,209,101,493,643
  5. Step 5: Solve for x
    x = 5,262,209,101,493,643/68,990,003.80
  6. Step 6: Final answer
    x = 76,274,950.16

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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.