Home / 85,840,043.20-128,760,064.80-82,491,964.90

Finding the Fourth Proportional to 85,840,043.20, 128,760,064.80 and 82,491,964.90

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Solution

The fourth proportional to 85,840,043.20, 128,760,064.80 and 82,491,964.90 is: 123,737,947.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840,043.20 : 128,760,064.80 = 82,491,964.90 : x
  2. Step 2: Convert to fraction form
    85,840,043.20/128,760,064.80 = 82,491,964.90/x
  3. Step 3: Cross multiply
    85,840,043.20x = 128,760,064.80 × 82,491,964.90
  4. Step 4: Simplify right side
    85,840,043.20x = 10,621,670,746,003,326
  5. Step 5: Solve for x
    x = 10,621,670,746,003,326/85,840,043.20
  6. Step 6: Final answer
    x = 123,737,947.35

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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.