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Finding the Fourth Proportional to 129,751.86, 179,055.18 and 73,163.28

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Solution

The fourth proportional to 129,751.86, 179,055.18 and 73,163.28 is: 100,963.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,751.86 : 179,055.18 = 73,163.28 : x
  2. Step 2: Convert to fraction form
    129,751.86/179,055.18 = 73,163.28/x
  3. Step 3: Cross multiply
    129,751.86x = 179,055.18 × 73,163.28
  4. Step 4: Simplify right side
    129,751.86x = 13,100,264,269.79
  5. Step 5: Solve for x
    x = 13,100,264,269.79/129,751.86
  6. Step 6: Final answer
    x = 100,963.98

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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.