Home / 79,228.48-109,104.86-74,163.20

Finding the Fourth Proportional to 79,228.48, 109,104.86 and 74,163.20

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Solution

The fourth proportional to 79,228.48, 109,104.86 and 74,163.20 is: 102,129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,228.48 : 109,104.86 = 74,163.20 : x
  2. Step 2: Convert to fraction form
    79,228.48/109,104.86 = 74,163.20/x
  3. Step 3: Cross multiply
    79,228.48x = 109,104.86 × 74,163.20
  4. Step 4: Simplify right side
    79,228.48x = 8,091,565,553.15
  5. Step 5: Solve for x
    x = 8,091,565,553.15/79,228.48
  6. Step 6: Final answer
    x = 102,129.51

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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.