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Finding the Fourth Proportional to 84,248,066, 126,372,099 and 20,422,658

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Solution

The fourth proportional to 84,248,066, 126,372,099 and 20,422,658 is: 30,633,987

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,248,066 : 126,372,099 = 20,422,658 : x
  2. Step 2: Convert to fraction form
    84,248,066/126,372,099 = 20,422,658/x
  3. Step 3: Cross multiply
    84,248,066x = 126,372,099 × 20,422,658
  4. Step 4: Simplify right side
    84,248,066x = 2,580,854,158,619,142
  5. Step 5: Solve for x
    x = 2,580,854,158,619,142/84,248,066
  6. Step 6: Final answer
    x = 30,633,987

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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.