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Finding the Fourth Proportional to 85,621.88, 128,469.58 and 33,068.27

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Solution

The fourth proportional to 85,621.88, 128,469.58 and 33,068.27 is: 49,616.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,621.88 : 128,469.58 = 33,068.27 : x
  2. Step 2: Convert to fraction form
    85,621.88/128,469.58 = 33,068.27/x
  3. Step 3: Cross multiply
    85,621.88x = 128,469.58 × 33,068.27
  4. Step 4: Simplify right side
    85,621.88x = 4,248,266,996.73
  5. Step 5: Solve for x
    x = 4,248,266,996.73/85,621.88
  6. Step 6: Final answer
    x = 49,616.60

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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.