Home / 79,629.31-109,939.68-49,458.30

Finding the Fourth Proportional to 79,629.31, 109,939.68 and 49,458.30

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Solution

The fourth proportional to 79,629.31, 109,939.68 and 49,458.30 is: 68,284.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,629.31 : 109,939.68 = 49,458.30 : x
  2. Step 2: Convert to fraction form
    79,629.31/109,939.68 = 49,458.30/x
  3. Step 3: Cross multiply
    79,629.31x = 109,939.68 × 49,458.30
  4. Step 4: Simplify right side
    79,629.31x = 5,437,429,263.07
  5. Step 5: Solve for x
    x = 5,437,429,263.07/79,629.31
  6. Step 6: Final answer
    x = 68,284.27

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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.