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Finding the Fourth Proportional to 79,441.90, 109,629.45 and 43,143.09

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Solution

The fourth proportional to 79,441.90, 109,629.45 and 43,143.09 is: 59,537.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,441.90 : 109,629.45 = 43,143.09 : x
  2. Step 2: Convert to fraction form
    79,441.90/109,629.45 = 43,143.09/x
  3. Step 3: Cross multiply
    79,441.90x = 109,629.45 × 43,143.09
  4. Step 4: Simplify right side
    79,441.90x = 4,729,753,587.72
  5. Step 5: Solve for x
    x = 4,729,753,587.72/79,441.90
  6. Step 6: Final answer
    x = 59,537.27

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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.