Home / 39,819,157,921.12-54,950,459,977.20-21,508,215,512.80

Finding the Fourth Proportional to 39,819,157,921.12, 54,950,459,977.20 and 21,508,215,512.80

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Solution

The fourth proportional to 39,819,157,921.12, 54,950,459,977.20 and 21,508,215,512.80 is: 29,681,349,315.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,819,157,921.12 : 54,950,459,977.20 = 21,508,215,512.80 : x
  2. Step 2: Convert to fraction form
    39,819,157,921.12/54,950,459,977.20 = 21,508,215,512.80/x
  3. Step 3: Cross multiply
    39,819,157,921.12x = 54,950,459,977.20 × 21,508,215,512.80
  4. Step 4: Simplify right side
    39,819,157,921.12x = 1,181,886,335,717,108,350,976
  5. Step 5: Solve for x
    x = 1,181,886,335,717,108,350,976/39,819,157,921.12
  6. Step 6: Final answer
    x = 29,681,349,315.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.