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Finding the Fourth Proportional to 129,809.82, 179,137.26 and 73,220.79

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Solution

The fourth proportional to 129,809.82, 179,137.26 and 73,220.79 is: 101,044.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,809.82 : 179,137.26 = 73,220.79 : x
  2. Step 2: Convert to fraction form
    129,809.82/179,137.26 = 73,220.79/x
  3. Step 3: Cross multiply
    129,809.82x = 179,137.26 × 73,220.79
  4. Step 4: Simplify right side
    129,809.82x = 13,116,571,695.64
  5. Step 5: Solve for x
    x = 13,116,571,695.64/129,809.82
  6. Step 6: Final answer
    x = 101,044.53

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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.