Home / 81,919,139.20-122,796,040.20-40,915,513.60

Finding the Fourth Proportional to 81,919,139.20, 122,796,040.20 and 40,915,513.60

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Solution

The fourth proportional to 81,919,139.20, 122,796,040.20 and 40,915,513.60 is: 61,331,980.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,919,139.20 : 122,796,040.20 = 40,915,513.60 : x
  2. Step 2: Convert to fraction form
    81,919,139.20/122,796,040.20 = 40,915,513.60/x
  3. Step 3: Cross multiply
    81,919,139.20x = 122,796,040.20 × 40,915,513.60
  4. Step 4: Simplify right side
    81,919,139.20x = 5,024,263,052,829,247
  5. Step 5: Solve for x
    x = 5,024,263,052,829,247/81,919,139.20
  6. Step 6: Final answer
    x = 61,331,980.56

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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.