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Finding the Fourth Proportional to 155,862.72, 215,086.23 and 87,879.09

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Solution

The fourth proportional to 155,862.72, 215,086.23 and 87,879.09 is: 121,270.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,862.72 : 215,086.23 = 87,879.09 : x
  2. Step 2: Convert to fraction form
    155,862.72/215,086.23 = 87,879.09/x
  3. Step 3: Cross multiply
    155,862.72x = 215,086.23 × 87,879.09
  4. Step 4: Simplify right side
    155,862.72x = 18,901,582,163.93
  5. Step 5: Solve for x
    x = 18,901,582,163.93/155,862.72
  6. Step 6: Final answer
    x = 121,270.71

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.