Home / 85,982,003.40-128,973,005.10-66,826,507.80

Finding the Fourth Proportional to 85,982,003.40, 128,973,005.10 and 66,826,507.80

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Solution

The fourth proportional to 85,982,003.40, 128,973,005.10 and 66,826,507.80 is: 100,239,761.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,982,003.40 : 128,973,005.10 = 66,826,507.80 : x
  2. Step 2: Convert to fraction form
    85,982,003.40/128,973,005.10 = 66,826,507.80/x
  3. Step 3: Cross multiply
    85,982,003.40x = 128,973,005.10 × 66,826,507.80
  4. Step 4: Simplify right side
    85,982,003.40x = 8,618,815,531,304,589
  5. Step 5: Solve for x
    x = 8,618,815,531,304,589/85,982,003.40
  6. Step 6: Final answer
    x = 100,239,761.70

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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.