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Finding the Fourth Proportional to 89,771.76, 123,816.60 and 68,621.04

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Solution

The fourth proportional to 89,771.76, 123,816.60 and 68,621.04 is: 94,644.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,771.76 : 123,816.60 = 68,621.04 : x
  2. Step 2: Convert to fraction form
    89,771.76/123,816.60 = 68,621.04/x
  3. Step 3: Cross multiply
    89,771.76x = 123,816.60 × 68,621.04
  4. Step 4: Simplify right side
    89,771.76x = 8,496,423,861.26
  5. Step 5: Solve for x
    x = 8,496,423,861.26/89,771.76
  6. Step 6: Final answer
    x = 94,644.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.