Home / 78,162.20-107,865.82-47,964.21

Finding the Fourth Proportional to 78,162.20, 107,865.82 and 47,964.21

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Solution

The fourth proportional to 78,162.20, 107,865.82 and 47,964.21 is: 66,191.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,162.20 : 107,865.82 = 47,964.21 : x
  2. Step 2: Convert to fraction form
    78,162.20/107,865.82 = 47,964.21/x
  3. Step 3: Cross multiply
    78,162.20x = 107,865.82 × 47,964.21
  4. Step 4: Simplify right side
    78,162.20x = 5,173,698,842.30
  5. Step 5: Solve for x
    x = 5,173,698,842.30/78,162.20
  6. Step 6: Final answer
    x = 66,191.83

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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.