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Finding the Fourth Proportional to 76,579.33, 114,853.84 and 72,781.79

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Solution

The fourth proportional to 76,579.33, 114,853.84 and 72,781.79 is: 109,158.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,579.33 : 114,853.84 = 72,781.79 : x
  2. Step 2: Convert to fraction form
    76,579.33/114,853.84 = 72,781.79/x
  3. Step 3: Cross multiply
    76,579.33x = 114,853.84 × 72,781.79
  4. Step 4: Simplify right side
    76,579.33x = 8,359,268,063.57
  5. Step 5: Solve for x
    x = 8,359,268,063.57/76,579.33
  6. Step 6: Final answer
    x = 109,158.28

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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.