Home / 129,764.80-179,087.94-78,765.77

Finding the Fourth Proportional to 129,764.80, 179,087.94 and 78,765.77

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Solution

The fourth proportional to 129,764.80, 179,087.94 and 78,765.77 is: 108,704.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,764.80 : 179,087.94 = 78,765.77 : x
  2. Step 2: Convert to fraction form
    129,764.80/179,087.94 = 78,765.77/x
  3. Step 3: Cross multiply
    129,764.80x = 179,087.94 × 78,765.77
  4. Step 4: Simplify right side
    129,764.80x = 14,105,999,491.81
  5. Step 5: Solve for x
    x = 14,105,999,491.81/129,764.80
  6. Step 6: Final answer
    x = 108,704.36

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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.