Home / 81,480,212.70-122,220,319.05-72,410,286.30

Finding the Fourth Proportional to 81,480,212.70, 122,220,319.05 and 72,410,286.30

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Solution

The fourth proportional to 81,480,212.70, 122,220,319.05 and 72,410,286.30 is: 108,615,429.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,480,212.70 : 122,220,319.05 = 72,410,286.30 : x
  2. Step 2: Convert to fraction form
    81,480,212.70/122,220,319.05 = 72,410,286.30/x
  3. Step 3: Cross multiply
    81,480,212.70x = 122,220,319.05 × 72,410,286.30
  4. Step 4: Simplify right side
    81,480,212.70x = 8,850,008,294,087,843
  5. Step 5: Solve for x
    x = 8,850,008,294,087,843/81,480,212.70
  6. Step 6: Final answer
    x = 108,615,429.45

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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.