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Finding the Fourth Proportional to 79,028.31, 109,059 and 43,218.30

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Solution

The fourth proportional to 79,028.31, 109,059 and 43,218.30 is: 59,641.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,028.31 : 109,059 = 43,218.30 : x
  2. Step 2: Convert to fraction form
    79,028.31/109,059 = 43,218.30/x
  3. Step 3: Cross multiply
    79,028.31x = 109,059 × 43,218.30
  4. Step 4: Simplify right side
    79,028.31x = 4,713,344,579.70
  5. Step 5: Solve for x
    x = 4,713,344,579.70/79,028.31
  6. Step 6: Final answer
    x = 59,641.22

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1.5x scale

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.