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Finding the Fourth Proportional to 266,635,788.78, 399,967,067.62 and 84,897,138.54

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Solution

The fourth proportional to 266,635,788.78, 399,967,067.62 and 84,897,138.54 is: 127,349,969.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,635,788.78 : 399,967,067.62 = 84,897,138.54 : x
  2. Step 2: Convert to fraction form
    266,635,788.78/399,967,067.62 = 84,897,138.54/x
  3. Step 3: Cross multiply
    266,635,788.78x = 399,967,067.62 × 84,897,138.54
  4. Step 4: Simplify right side
    266,635,788.78x = 33,956,059,551,172,692
  5. Step 5: Solve for x
    x = 33,956,059,551,172,692/266,635,788.78
  6. Step 6: Final answer
    x = 127,349,969.43

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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.