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Finding the Fourth Proportional to 143,920.85, 215,879.76 and 49,149.95

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Solution

The fourth proportional to 143,920.85, 215,879.76 and 49,149.95 is: 73,724.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,920.85 : 215,879.76 = 49,149.95 : x
  2. Step 2: Convert to fraction form
    143,920.85/215,879.76 = 49,149.95/x
  3. Step 3: Cross multiply
    143,920.85x = 215,879.76 × 49,149.95
  4. Step 4: Simplify right side
    143,920.85x = 10,610,479,410.01
  5. Step 5: Solve for x
    x = 10,610,479,410.01/143,920.85
  6. Step 6: Final answer
    x = 73,724.41

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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.