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Finding the Fourth Proportional to 84,305.79, 116,874.68 and 79,811.43

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Solution

The fourth proportional to 84,305.79, 116,874.68 and 79,811.43 is: 110,644.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,305.79 : 116,874.68 = 79,811.43 : x
  2. Step 2: Convert to fraction form
    84,305.79/116,874.68 = 79,811.43/x
  3. Step 3: Cross multiply
    84,305.79x = 116,874.68 × 79,811.43
  4. Step 4: Simplify right side
    84,305.79x = 9,327,935,541.12
  5. Step 5: Solve for x
    x = 9,327,935,541.12/84,305.79
  6. Step 6: Final answer
    x = 110,644.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.