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Finding the Fourth Proportional to 129,756.72, 179,064.60 and 73,169.04

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Solution

The fourth proportional to 129,756.72, 179,064.60 and 73,169.04 is: 100,973.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,756.72 : 179,064.60 = 73,169.04 : x
  2. Step 2: Convert to fraction form
    129,756.72/179,064.60 = 73,169.04/x
  3. Step 3: Cross multiply
    129,756.72x = 179,064.60 × 73,169.04
  4. Step 4: Simplify right side
    129,756.72x = 13,101,984,879.98
  5. Step 5: Solve for x
    x = 13,101,984,879.98/129,756.72
  6. Step 6: Final answer
    x = 100,973.46

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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.