Home / 128,780,147.20-193,394,169.60-68,313,971.20

Finding the Fourth Proportional to 128,780,147.20, 193,394,169.60 and 68,313,971.20

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Solution

The fourth proportional to 128,780,147.20, 193,394,169.60 and 68,313,971.20 is: 102,589,754.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,780,147.20 : 193,394,169.60 = 68,313,971.20 : x
  2. Step 2: Convert to fraction form
    128,780,147.20/193,394,169.60 = 68,313,971.20/x
  3. Step 3: Cross multiply
    128,780,147.20x = 193,394,169.60 × 68,313,971.20
  4. Step 4: Simplify right side
    128,780,147.20x = 13,211,523,732,302,316
  5. Step 5: Solve for x
    x = 13,211,523,732,302,316/128,780,147.20
  6. Step 6: Final answer
    x = 102,589,754.86

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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.