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Finding the Fourth Proportional to 129,757.11, 179,064.51 and 73,168.08

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Solution

The fourth proportional to 129,757.11, 179,064.51 and 73,168.08 is: 100,971.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,757.11 : 179,064.51 = 73,168.08 : x
  2. Step 2: Convert to fraction form
    129,757.11/179,064.51 = 73,168.08/x
  3. Step 3: Cross multiply
    129,757.11x = 179,064.51 × 73,168.08
  4. Step 4: Simplify right side
    129,757.11x = 13,101,806,392.84
  5. Step 5: Solve for x
    x = 13,101,806,392.84/129,757.11
  6. Step 6: Final answer
    x = 100,971.78

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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.