Home / 85,839,810.70-128,759,716.05-82,491,732.40

Finding the Fourth Proportional to 85,839,810.70, 128,759,716.05 and 82,491,732.40

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Solution

The fourth proportional to 85,839,810.70, 128,759,716.05 and 82,491,732.40 is: 123,737,598.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,810.70 : 128,759,716.05 = 82,491,732.40 : x
  2. Step 2: Convert to fraction form
    85,839,810.70/128,759,716.05 = 82,491,732.40/x
  3. Step 3: Cross multiply
    85,839,810.70x = 128,759,716.05 × 82,491,732.40
  4. Step 4: Simplify right side
    85,839,810.70x = 10,621,612,040,296,586
  5. Step 5: Solve for x
    x = 10,621,612,040,296,586/85,839,810.70
  6. Step 6: Final answer
    x = 123,737,598.60

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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.