Home / 80,167,147.20-120,250,720.80-68,688,021.60

Finding the Fourth Proportional to 80,167,147.20, 120,250,720.80 and 68,688,021.60

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Solution

The fourth proportional to 80,167,147.20, 120,250,720.80 and 68,688,021.60 is: 103,032,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,167,147.20 : 120,250,720.80 = 68,688,021.60 : x
  2. Step 2: Convert to fraction form
    80,167,147.20/120,250,720.80 = 68,688,021.60/x
  3. Step 3: Cross multiply
    80,167,147.20x = 120,250,720.80 × 68,688,021.60
  4. Step 4: Simplify right side
    80,167,147.20x = 8,259,784,107,725,968
  5. Step 5: Solve for x
    x = 8,259,784,107,725,968/80,167,147.20
  6. Step 6: Final answer
    x = 103,032,032.40

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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.