Home / 78,850.35-118,198.98-31,451.67

Finding the Fourth Proportional to 78,850.35, 118,198.98 and 31,451.67

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Solution

The fourth proportional to 78,850.35, 118,198.98 and 31,451.67 is: 47,146.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,850.35 : 118,198.98 = 31,451.67 : x
  2. Step 2: Convert to fraction form
    78,850.35/118,198.98 = 31,451.67/x
  3. Step 3: Cross multiply
    78,850.35x = 118,198.98 × 31,451.67
  4. Step 4: Simplify right side
    78,850.35x = 3,717,555,313.30
  5. Step 5: Solve for x
    x = 3,717,555,313.30/78,850.35
  6. Step 6: Final answer
    x = 47,146.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.