Home / 138,781,859.20-208,023,489.60-52,486,921.60

Finding the Fourth Proportional to 138,781,859.20, 208,023,489.60 and 52,486,921.60

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Solution

The fourth proportional to 138,781,859.20, 208,023,489.60 and 52,486,921.60 is: 78,673,917.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,781,859.20 : 208,023,489.60 = 52,486,921.60 : x
  2. Step 2: Convert to fraction form
    138,781,859.20/208,023,489.60 = 52,486,921.60/x
  3. Step 3: Cross multiply
    138,781,859.20x = 208,023,489.60 × 52,486,921.60
  4. Step 4: Simplify right side
    138,781,859.20x = 10,918,512,589,593,616
  5. Step 5: Solve for x
    x = 10,918,512,589,593,616/138,781,859.20
  6. Step 6: Final answer
    x = 78,673,917.85

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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.