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Finding the Fourth Proportional to 50,879.89, 70,215.06 and 28,219.81

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Solution

The fourth proportional to 50,879.89, 70,215.06 and 28,219.81 is: 38,943.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,879.89 : 70,215.06 = 28,219.81 : x
  2. Step 2: Convert to fraction form
    50,879.89/70,215.06 = 28,219.81/x
  3. Step 3: Cross multiply
    50,879.89x = 70,215.06 × 28,219.81
  4. Step 4: Simplify right side
    50,879.89x = 1,981,455,652.34
  5. Step 5: Solve for x
    x = 1,981,455,652.34/50,879.89
  6. Step 6: Final answer
    x = 38,943.79

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Why These Related Problems?

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