Home / 85,451,624.70-128,177,438.57-20,754,993.77

Finding the Fourth Proportional to 85,451,624.70, 128,177,438.57 and 20,754,993.77

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Solution

The fourth proportional to 85,451,624.70, 128,177,438.57 and 20,754,993.77 is: 31,132,491.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,451,624.70 : 128,177,438.57 = 20,754,993.77 : x
  2. Step 2: Convert to fraction form
    85,451,624.70/128,177,438.57 = 20,754,993.77/x
  3. Step 3: Cross multiply
    85,451,624.70x = 128,177,438.57 × 20,754,993.77
  4. Step 4: Simplify right side
    85,451,624.70x = 2,660,321,938,230,245.50
  5. Step 5: Solve for x
    x = 2,660,321,938,230,245.50/85,451,624.70
  6. Step 6: Final answer
    x = 31,132,491.02

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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.