Home / 85,507,108.72-128,214,523.15-38,795,099.60

Finding the Fourth Proportional to 85,507,108.72, 128,214,523.15 and 38,795,099.60

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Solution

The fourth proportional to 85,507,108.72, 128,214,523.15 and 38,795,099.60 is: 58,171,715.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,507,108.72 : 128,214,523.15 = 38,795,099.60 : x
  2. Step 2: Convert to fraction form
    85,507,108.72/128,214,523.15 = 38,795,099.60/x
  3. Step 3: Cross multiply
    85,507,108.72x = 128,214,523.15 × 38,795,099.60
  4. Step 4: Simplify right side
    85,507,108.72x = 4,974,095,195,770,756
  5. Step 5: Solve for x
    x = 4,974,095,195,770,756/85,507,108.72
  6. Step 6: Final answer
    x = 58,171,715.43

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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.