Home / 78,207.50-107,806.92-47,936.72

Finding the Fourth Proportional to 78,207.50, 107,806.92 and 47,936.72

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Solution

The fourth proportional to 78,207.50, 107,806.92 and 47,936.72 is: 66,079.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,207.50 : 107,806.92 = 47,936.72 : x
  2. Step 2: Convert to fraction form
    78,207.50/107,806.92 = 47,936.72/x
  3. Step 3: Cross multiply
    78,207.50x = 107,806.92 × 47,936.72
  4. Step 4: Simplify right side
    78,207.50x = 5,167,910,138.10
  5. Step 5: Solve for x
    x = 5,167,910,138.10/78,207.50
  6. Step 6: Final answer
    x = 66,079.47

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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.