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Finding the Fourth Proportional to 145,879.68, 218,917.96 and 57,122.11

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Solution

The fourth proportional to 145,879.68, 218,917.96 and 57,122.11 is: 85,721.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,879.68 : 218,917.96 = 57,122.11 : x
  2. Step 2: Convert to fraction form
    145,879.68/218,917.96 = 57,122.11/x
  3. Step 3: Cross multiply
    145,879.68x = 218,917.96 × 57,122.11
  4. Step 4: Simplify right side
    145,879.68x = 12,505,055,922.94
  5. Step 5: Solve for x
    x = 12,505,055,922.94/145,879.68
  6. Step 6: Final answer
    x = 85,721.71

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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.