Home / 85,839,763.20-128,759,644.80-82,491,684.90

Finding the Fourth Proportional to 85,839,763.20, 128,759,644.80 and 82,491,684.90

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Solution

The fourth proportional to 85,839,763.20, 128,759,644.80 and 82,491,684.90 is: 123,737,527.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,763.20 : 128,759,644.80 = 82,491,684.90 : x
  2. Step 2: Convert to fraction form
    85,839,763.20/128,759,644.80 = 82,491,684.90/x
  3. Step 3: Cross multiply
    85,839,763.20x = 128,759,644.80 × 82,491,684.90
  4. Step 4: Simplify right side
    85,839,763.20x = 10,621,600,046,677,524
  5. Step 5: Solve for x
    x = 10,621,600,046,677,524/85,839,763.20
  6. Step 6: Final answer
    x = 123,737,527.35

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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.