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Finding the Fourth Proportional to 129,782.48, 179,092.50 and 73,190.48

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Solution

The fourth proportional to 129,782.48, 179,092.50 and 73,190.48 is: 100,998.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,782.48 : 179,092.50 = 73,190.48 : x
  2. Step 2: Convert to fraction form
    129,782.48/179,092.50 = 73,190.48/x
  3. Step 3: Cross multiply
    129,782.48x = 179,092.50 × 73,190.48
  4. Step 4: Simplify right side
    129,782.48x = 13,107,866,039.40
  5. Step 5: Solve for x
    x = 13,107,866,039.40/129,782.48
  6. Step 6: Final answer
    x = 100,998.73

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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.