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Finding the Fourth Proportional to 316,879.12, 475,319.49 and 80,221.83

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Solution

The fourth proportional to 316,879.12, 475,319.49 and 80,221.83 is: 120,332.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,879.12 : 475,319.49 = 80,221.83 : x
  2. Step 2: Convert to fraction form
    316,879.12/475,319.49 = 80,221.83/x
  3. Step 3: Cross multiply
    316,879.12x = 475,319.49 × 80,221.83
  4. Step 4: Simplify right side
    316,879.12x = 38,130,998,435.00
  5. Step 5: Solve for x
    x = 38,130,998,435.00/316,879.12
  6. Step 6: Final answer
    x = 120,332.95

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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.