Home / 129,745.23-179,017.90-78,756.69

Finding the Fourth Proportional to 129,745.23, 179,017.90 and 78,756.69

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Solution

The fourth proportional to 129,745.23, 179,017.90 and 78,756.69 is: 108,665.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,745.23 : 179,017.90 = 78,756.69 : x
  2. Step 2: Convert to fraction form
    129,745.23/179,017.90 = 78,756.69/x
  3. Step 3: Cross multiply
    129,745.23x = 179,017.90 × 78,756.69
  4. Step 4: Simplify right side
    129,745.23x = 14,098,856,722.20
  5. Step 5: Solve for x
    x = 14,098,856,722.20/129,745.23
  6. Step 6: Final answer
    x = 108,665.71

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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.