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Finding the Fourth Proportional to 91,279.76, 125,786.61 and 69,793.83

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Solution

The fourth proportional to 91,279.76, 125,786.61 and 69,793.83 is: 96,178.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,279.76 : 125,786.61 = 69,793.83 : x
  2. Step 2: Convert to fraction form
    91,279.76/125,786.61 = 69,793.83/x
  3. Step 3: Cross multiply
    91,279.76x = 125,786.61 × 69,793.83
  4. Step 4: Simplify right side
    91,279.76x = 8,779,129,274.62
  5. Step 5: Solve for x
    x = 8,779,129,274.62/91,279.76
  6. Step 6: Final answer
    x = 96,178.27

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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.