Home / 138,036,005.40-206,802,065.70-84,120,331.80

Finding the Fourth Proportional to 138,036,005.40, 206,802,065.70 and 84,120,331.80

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Solution

The fourth proportional to 138,036,005.40, 206,802,065.70 and 84,120,331.80 is: 126,026,961.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,036,005.40 : 206,802,065.70 = 84,120,331.80 : x
  2. Step 2: Convert to fraction form
    138,036,005.40/206,802,065.70 = 84,120,331.80/x
  3. Step 3: Cross multiply
    138,036,005.40x = 206,802,065.70 × 84,120,331.80
  4. Step 4: Simplify right side
    138,036,005.40x = 17,396,258,383,609,398
  5. Step 5: Solve for x
    x = 17,396,258,383,609,398/138,036,005.40
  6. Step 6: Final answer
    x = 126,026,961.83

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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.