Home / 78,949.43-108,948.90-43,138.67

Finding the Fourth Proportional to 78,949.43, 108,948.90 and 43,138.67

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Solution

The fourth proportional to 78,949.43, 108,948.90 and 43,138.67 is: 59,530.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,949.43 : 108,948.90 = 43,138.67 : x
  2. Step 2: Convert to fraction form
    78,949.43/108,948.90 = 43,138.67/x
  3. Step 3: Cross multiply
    78,949.43x = 108,948.90 × 43,138.67
  4. Step 4: Simplify right side
    78,949.43x = 4,699,910,099.22
  5. Step 5: Solve for x
    x = 4,699,910,099.22/78,949.43
  6. Step 6: Final answer
    x = 59,530.64

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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.