Home / 78,659.09-108,589.78-53,299.47

Finding the Fourth Proportional to 78,659.09, 108,589.78 and 53,299.47

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Solution

The fourth proportional to 78,659.09, 108,589.78 and 53,299.47 is: 73,580.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,659.09 : 108,589.78 = 53,299.47 : x
  2. Step 2: Convert to fraction form
    78,659.09/108,589.78 = 53,299.47/x
  3. Step 3: Cross multiply
    78,659.09x = 108,589.78 × 53,299.47
  4. Step 4: Simplify right side
    78,659.09x = 5,787,777,721.42
  5. Step 5: Solve for x
    x = 5,787,777,721.42/78,659.09
  6. Step 6: Final answer
    x = 73,580.53

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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.