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Finding the Fourth Proportional to 84,248,064, 126,372,096 and 20,422,656

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Solution

The fourth proportional to 84,248,064, 126,372,096 and 20,422,656 is: 30,633,984

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,248,064 : 126,372,096 = 20,422,656 : x
  2. Step 2: Convert to fraction form
    84,248,064/126,372,096 = 20,422,656/x
  3. Step 3: Cross multiply
    84,248,064x = 126,372,096 × 20,422,656
  4. Step 4: Simplify right side
    84,248,064x = 2,580,853,844,606,976
  5. Step 5: Solve for x
    x = 2,580,853,844,606,976/84,248,064
  6. Step 6: Final answer
    x = 30,633,984

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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.