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Finding the Fourth Proportional to 129,606.60, 178,867.74 and 73,021.80

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Solution

The fourth proportional to 129,606.60, 178,867.74 and 73,021.80 is: 100,776.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,606.60 : 178,867.74 = 73,021.80 : x
  2. Step 2: Convert to fraction form
    129,606.60/178,867.74 = 73,021.80/x
  3. Step 3: Cross multiply
    129,606.60x = 178,867.74 × 73,021.80
  4. Step 4: Simplify right side
    129,606.60x = 13,061,244,336.73
  5. Step 5: Solve for x
    x = 13,061,244,336.73/129,606.60
  6. Step 6: Final answer
    x = 100,776.07

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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.