Home / 79,128.30-109,198.97-43,318.20

Finding the Fourth Proportional to 79,128.30, 109,198.97 and 43,318.20

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Solution

The fourth proportional to 79,128.30, 109,198.97 and 43,318.20 is: 59,780.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.30 : 109,198.97 = 43,318.20 : x
  2. Step 2: Convert to fraction form
    79,128.30/109,198.97 = 43,318.20/x
  3. Step 3: Cross multiply
    79,128.30x = 109,198.97 × 43,318.20
  4. Step 4: Simplify right side
    79,128.30x = 4,730,302,822.25
  5. Step 5: Solve for x
    x = 4,730,302,822.25/79,128.30
  6. Step 6: Final answer
    x = 59,780.16

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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.