Home / 218,609,982.92-327,972,405.22-78,564,579.86

Finding the Fourth Proportional to 218,609,982.92, 327,972,405.22 and 78,564,579.86

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Solution

The fourth proportional to 218,609,982.92, 327,972,405.22 and 78,564,579.86 is: 117,867,509.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,609,982.92 : 327,972,405.22 = 78,564,579.86 : x
  2. Step 2: Convert to fraction form
    218,609,982.92/327,972,405.22 = 78,564,579.86/x
  3. Step 3: Cross multiply
    218,609,982.92x = 327,972,405.22 × 78,564,579.86
  4. Step 4: Simplify right side
    218,609,982.92x = 25,767,014,221,782,972
  5. Step 5: Solve for x
    x = 25,767,014,221,782,972/218,609,982.92
  6. Step 6: Final answer
    x = 117,867,509.42

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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.