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Finding the Fourth Proportional to 129,703.08, 178,993 and 73,114.44

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Solution

The fourth proportional to 129,703.08, 178,993 and 73,114.44 is: 100,899.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,703.08 : 178,993 = 73,114.44 : x
  2. Step 2: Convert to fraction form
    129,703.08/178,993 = 73,114.44/x
  3. Step 3: Cross multiply
    129,703.08x = 178,993 × 73,114.44
  4. Step 4: Simplify right side
    129,703.08x = 13,086,972,958.92
  5. Step 5: Solve for x
    x = 13,086,972,958.92/129,703.08
  6. Step 6: Final answer
    x = 100,899.48

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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.