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Finding the Fourth Proportional to 84,248,090, 126,372,135 and 20,422,682

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Solution

The fourth proportional to 84,248,090, 126,372,135 and 20,422,682 is: 30,634,023

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,248,090 : 126,372,135 = 20,422,682 : x
  2. Step 2: Convert to fraction form
    84,248,090/126,372,135 = 20,422,682/x
  3. Step 3: Cross multiply
    84,248,090x = 126,372,135 × 20,422,682
  4. Step 4: Simplify right side
    84,248,090x = 2,580,857,926,766,070
  5. Step 5: Solve for x
    x = 2,580,857,926,766,070/84,248,090
  6. Step 6: Final answer
    x = 30,634,023

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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.