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Finding the Fourth Proportional to 128,861.64, 193,305.73 and 44,621.64

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Solution

The fourth proportional to 128,861.64, 193,305.73 and 44,621.64 is: 66,937.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,861.64 : 193,305.73 = 44,621.64 : x
  2. Step 2: Convert to fraction form
    128,861.64/193,305.73 = 44,621.64/x
  3. Step 3: Cross multiply
    128,861.64x = 193,305.73 × 44,621.64
  4. Step 4: Simplify right side
    128,861.64x = 8,625,618,694.00
  5. Step 5: Solve for x
    x = 8,625,618,694.00/128,861.64
  6. Step 6: Final answer
    x = 66,937.06

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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.