Home / 100,296.72-138,381.46-79,009.92

Finding the Fourth Proportional to 100,296.72, 138,381.46 and 79,009.92

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Solution

The fourth proportional to 100,296.72, 138,381.46 and 79,009.92 is: 109,011.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,296.72 : 138,381.46 = 79,009.92 : x
  2. Step 2: Convert to fraction form
    100,296.72/138,381.46 = 79,009.92/x
  3. Step 3: Cross multiply
    100,296.72x = 138,381.46 × 79,009.92
  4. Step 4: Simplify right side
    100,296.72x = 10,933,508,084.08
  5. Step 5: Solve for x
    x = 10,933,508,084.08/100,296.72
  6. Step 6: Final answer
    x = 109,011.62

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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.