Home / 85,839,814.70-128,759,722.05-82,491,736.40

Finding the Fourth Proportional to 85,839,814.70, 128,759,722.05 and 82,491,736.40

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Solution

The fourth proportional to 85,839,814.70, 128,759,722.05 and 82,491,736.40 is: 123,737,604.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,814.70 : 128,759,722.05 = 82,491,736.40 : x
  2. Step 2: Convert to fraction form
    85,839,814.70/128,759,722.05 = 82,491,736.40/x
  3. Step 3: Cross multiply
    85,839,814.70x = 128,759,722.05 × 82,491,736.40
  4. Step 4: Simplify right side
    85,839,814.70x = 10,621,613,050,285,868
  5. Step 5: Solve for x
    x = 10,621,613,050,285,868/85,839,814.70
  6. Step 6: Final answer
    x = 123,737,604.60

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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.