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Finding the Fourth Proportional to 129,761.89, 179,071.44 and 73,173.28

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Solution

The fourth proportional to 129,761.89, 179,071.44 and 73,173.28 is: 100,979.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,761.89 : 179,071.44 = 73,173.28 : x
  2. Step 2: Convert to fraction form
    129,761.89/179,071.44 = 73,173.28/x
  3. Step 3: Cross multiply
    129,761.89x = 179,071.44 × 73,173.28
  4. Step 4: Simplify right side
    129,761.89x = 13,103,244,619.12
  5. Step 5: Solve for x
    x = 13,103,244,619.12/129,761.89
  6. Step 6: Final answer
    x = 100,979.14

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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.