Home / 79,138.13-109,206.31-43,321.22

Finding the Fourth Proportional to 79,138.13, 109,206.31 and 43,321.22

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Solution

The fourth proportional to 79,138.13, 109,206.31 and 43,321.22 is: 59,780.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,138.13 : 109,206.31 = 43,321.22 : x
  2. Step 2: Convert to fraction form
    79,138.13/109,206.31 = 43,321.22/x
  3. Step 3: Cross multiply
    79,138.13x = 109,206.31 × 43,321.22
  4. Step 4: Simplify right side
    79,138.13x = 4,730,949,818.26
  5. Step 5: Solve for x
    x = 4,730,949,818.26/79,138.13
  6. Step 6: Final answer
    x = 59,780.92

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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.