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Finding the Fourth Proportional to 129,754.89, 179,061.78 and 73,166.28

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Solution

The fourth proportional to 129,754.89, 179,061.78 and 73,166.28 is: 100,969.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,754.89 : 179,061.78 = 73,166.28 : x
  2. Step 2: Convert to fraction form
    129,754.89/179,061.78 = 73,166.28/x
  3. Step 3: Cross multiply
    129,754.89x = 179,061.78 × 73,166.28
  4. Step 4: Simplify right side
    129,754.89x = 13,101,284,332.78
  5. Step 5: Solve for x
    x = 13,101,284,332.78/129,754.89
  6. Step 6: Final answer
    x = 100,969.48

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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.