Home / 81,729,913.28-122,595,321.36-20,319,072.08

Finding the Fourth Proportional to 81,729,913.28, 122,595,321.36 and 20,319,072.08

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Solution

The fourth proportional to 81,729,913.28, 122,595,321.36 and 20,319,072.08 is: 30,478,720.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,729,913.28 : 122,595,321.36 = 20,319,072.08 : x
  2. Step 2: Convert to fraction form
    81,729,913.28/122,595,321.36 = 20,319,072.08/x
  3. Step 3: Cross multiply
    81,729,913.28x = 122,595,321.36 × 20,319,072.08
  4. Step 4: Simplify right side
    81,729,913.28x = 2,491,023,171,384,603.50
  5. Step 5: Solve for x
    x = 2,491,023,171,384,603.50/81,729,913.28
  6. Step 6: Final answer
    x = 30,478,720.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.