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Finding the Fourth Proportional to 135,305.85, 186,717.47 and 74,879.04

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Solution

The fourth proportional to 135,305.85, 186,717.47 and 74,879.04 is: 103,330.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,305.85 : 186,717.47 = 74,879.04 : x
  2. Step 2: Convert to fraction form
    135,305.85/186,717.47 = 74,879.04/x
  3. Step 3: Cross multiply
    135,305.85x = 186,717.47 × 74,879.04
  4. Step 4: Simplify right side
    135,305.85x = 13,981,224,530.43
  5. Step 5: Solve for x
    x = 13,981,224,530.43/135,305.85
  6. Step 6: Final answer
    x = 103,330.53

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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.