Home / 214,560,138.80-321,840,208.20-78,249,969.20

Finding the Fourth Proportional to 214,560,138.80, 321,840,208.20 and 78,249,969.20

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Solution

The fourth proportional to 214,560,138.80, 321,840,208.20 and 78,249,969.20 is: 117,374,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,560,138.80 : 321,840,208.20 = 78,249,969.20 : x
  2. Step 2: Convert to fraction form
    214,560,138.80/321,840,208.20 = 78,249,969.20/x
  3. Step 3: Cross multiply
    214,560,138.80x = 321,840,208.20 × 78,249,969.20
  4. Step 4: Simplify right side
    214,560,138.80x = 25,183,986,378,971,588
  5. Step 5: Solve for x
    x = 25,183,986,378,971,588/214,560,138.80
  6. Step 6: Final answer
    x = 117,374,953.80

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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.