Home / 129,958.54-179,307.18-78,928.54

Finding the Fourth Proportional to 129,958.54, 179,307.18 and 78,928.54

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Solution

The fourth proportional to 129,958.54, 179,307.18 and 78,928.54 is: 108,899.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,958.54 : 179,307.18 = 78,928.54 : x
  2. Step 2: Convert to fraction form
    129,958.54/179,307.18 = 78,928.54/x
  3. Step 3: Cross multiply
    129,958.54x = 179,307.18 × 78,928.54
  4. Step 4: Simplify right side
    129,958.54x = 14,152,453,928.92
  5. Step 5: Solve for x
    x = 14,152,453,928.92/129,958.54
  6. Step 6: Final answer
    x = 108,899.76

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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.