Home / 129,974.39-179,289.84-78,255.53

Finding the Fourth Proportional to 129,974.39, 179,289.84 and 78,255.53

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Solution

The fourth proportional to 129,974.39, 179,289.84 and 78,255.53 is: 107,947.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,974.39 : 179,289.84 = 78,255.53 : x
  2. Step 2: Convert to fraction form
    129,974.39/179,289.84 = 78,255.53/x
  3. Step 3: Cross multiply
    129,974.39x = 179,289.84 × 78,255.53
  4. Step 4: Simplify right side
    129,974.39x = 14,030,421,452.82
  5. Step 5: Solve for x
    x = 14,030,421,452.82/129,974.39
  6. Step 6: Final answer
    x = 107,947.58

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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.