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Finding the Fourth Proportional to 82,904.70, 124,210.65 and 80,163.90

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Solution

The fourth proportional to 82,904.70, 124,210.65 and 80,163.90 is: 120,104.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,904.70 : 124,210.65 = 80,163.90 : x
  2. Step 2: Convert to fraction form
    82,904.70/124,210.65 = 80,163.90/x
  3. Step 3: Cross multiply
    82,904.70x = 124,210.65 × 80,163.90
  4. Step 4: Simplify right side
    82,904.70x = 9,957,210,125.54
  5. Step 5: Solve for x
    x = 9,957,210,125.54/82,904.70
  6. Step 6: Final answer
    x = 120,104.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.