Home / 85,839,819.20-128,759,728.80-82,491,740.90

Finding the Fourth Proportional to 85,839,819.20, 128,759,728.80 and 82,491,740.90

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Solution

The fourth proportional to 85,839,819.20, 128,759,728.80 and 82,491,740.90 is: 123,737,611.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,819.20 : 128,759,728.80 = 82,491,740.90 : x
  2. Step 2: Convert to fraction form
    85,839,819.20/128,759,728.80 = 82,491,740.90/x
  3. Step 3: Cross multiply
    85,839,819.20x = 128,759,728.80 × 82,491,740.90
  4. Step 4: Simplify right side
    85,839,819.20x = 10,621,614,186,523,868
  5. Step 5: Solve for x
    x = 10,621,614,186,523,868/85,839,819.20
  6. Step 6: Final answer
    x = 123,737,611.35

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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.