Home / 129,974.40-179,289.84-78,255.54

Finding the Fourth Proportional to 129,974.40, 179,289.84 and 78,255.54

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Solution

The fourth proportional to 129,974.40, 179,289.84 and 78,255.54 is: 107,947.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,974.40 : 179,289.84 = 78,255.54 : x
  2. Step 2: Convert to fraction form
    129,974.40/179,289.84 = 78,255.54/x
  3. Step 3: Cross multiply
    129,974.40x = 179,289.84 × 78,255.54
  4. Step 4: Simplify right side
    129,974.40x = 14,030,423,245.71
  5. Step 5: Solve for x
    x = 14,030,423,245.71/129,974.40
  6. Step 6: Final answer
    x = 107,947.59

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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.