Home / 215,651,378.18-323,147,906.75-128,040,371.21

Finding the Fourth Proportional to 215,651,378.18, 323,147,906.75 and 128,040,371.21

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Solution

The fourth proportional to 215,651,378.18, 323,147,906.75 and 128,040,371.21 is: 191,865,121.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,651,378.18 : 323,147,906.75 = 128,040,371.21 : x
  2. Step 2: Convert to fraction form
    215,651,378.18/323,147,906.75 = 128,040,371.21/x
  3. Step 3: Cross multiply
    215,651,378.18x = 323,147,906.75 × 128,040,371.21
  4. Step 4: Simplify right side
    215,651,378.18x = 41,375,977,933,748,520
  5. Step 5: Solve for x
    x = 41,375,977,933,748,520/215,651,378.18
  6. Step 6: Final answer
    x = 191,865,121.77

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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.