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Finding the Fourth Proportional to 324,451,770.78, 486,677,661.81 and 78,806,750.39

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Solution

The fourth proportional to 324,451,770.78, 486,677,661.81 and 78,806,750.39 is: 118,210,126.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,451,770.78 : 486,677,661.81 = 78,806,750.39 : x
  2. Step 2: Convert to fraction form
    324,451,770.78/486,677,661.81 = 78,806,750.39/x
  3. Step 3: Cross multiply
    324,451,770.78x = 486,677,661.81 × 78,806,750.39
  4. Step 4: Simplify right side
    324,451,770.78x = 38,353,485,014,649,504
  5. Step 5: Solve for x
    x = 38,353,485,014,649,504/324,451,770.78
  6. Step 6: Final answer
    x = 118,210,126.95

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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.