Home / 85,839,766.20-128,759,649.30-82,491,687.90

Finding the Fourth Proportional to 85,839,766.20, 128,759,649.30 and 82,491,687.90

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Solution

The fourth proportional to 85,839,766.20, 128,759,649.30 and 82,491,687.90 is: 123,737,531.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,766.20 : 128,759,649.30 = 82,491,687.90 : x
  2. Step 2: Convert to fraction form
    85,839,766.20/128,759,649.30 = 82,491,687.90/x
  3. Step 3: Cross multiply
    85,839,766.20x = 128,759,649.30 × 82,491,687.90
  4. Step 4: Simplify right side
    85,839,766.20x = 10,621,600,804,169,054
  5. Step 5: Solve for x
    x = 10,621,600,804,169,054/85,839,766.20
  6. Step 6: Final answer
    x = 123,737,531.85

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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.