Home / 78,715.85-118,091.31-28,794.84

Finding the Fourth Proportional to 78,715.85, 118,091.31 and 28,794.84

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Solution

The fourth proportional to 78,715.85, 118,091.31 and 28,794.84 is: 43,198.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,715.85 : 118,091.31 = 28,794.84 : x
  2. Step 2: Convert to fraction form
    78,715.85/118,091.31 = 28,794.84/x
  3. Step 3: Cross multiply
    78,715.85x = 118,091.31 × 28,794.84
  4. Step 4: Simplify right side
    78,715.85x = 3,400,419,826.02
  5. Step 5: Solve for x
    x = 3,400,419,826.02/78,715.85
  6. Step 6: Final answer
    x = 43,198.67

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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.