Home / 78,910.20-108,782.80-48,675.13

Finding the Fourth Proportional to 78,910.20, 108,782.80 and 48,675.13

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Solution

The fourth proportional to 78,910.20, 108,782.80 and 48,675.13 is: 67,101.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,910.20 : 108,782.80 = 48,675.13 : x
  2. Step 2: Convert to fraction form
    78,910.20/108,782.80 = 48,675.13/x
  3. Step 3: Cross multiply
    78,910.20x = 108,782.80 × 48,675.13
  4. Step 4: Simplify right side
    78,910.20x = 5,295,016,538.12
  5. Step 5: Solve for x
    x = 5,295,016,538.12/78,910.20
  6. Step 6: Final answer
    x = 67,101.80

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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.