Home / 85,824,044.70-128,736,067.05-21,127,335.90

Finding the Fourth Proportional to 85,824,044.70, 128,736,067.05 and 21,127,335.90

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Solution

The fourth proportional to 85,824,044.70, 128,736,067.05 and 21,127,335.90 is: 31,691,003.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,044.70 : 128,736,067.05 = 21,127,335.90 : x
  2. Step 2: Convert to fraction form
    85,824,044.70/128,736,067.05 = 21,127,335.90/x
  3. Step 3: Cross multiply
    85,824,044.70x = 128,736,067.05 × 21,127,335.90
  4. Step 4: Simplify right side
    85,824,044.70x = 2,719,850,131,010,272
  5. Step 5: Solve for x
    x = 2,719,850,131,010,272/85,824,044.70
  6. Step 6: Final answer
    x = 31,691,003.85

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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.