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Finding the Fourth Proportional to 79,138.94, 109,207.59 and 43,322.09

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Solution

The fourth proportional to 79,138.94, 109,207.59 and 43,322.09 is: 59,782.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,138.94 : 109,207.59 = 43,322.09 : x
  2. Step 2: Convert to fraction form
    79,138.94/109,207.59 = 43,322.09/x
  3. Step 3: Cross multiply
    79,138.94x = 109,207.59 × 43,322.09
  4. Step 4: Simplify right side
    79,138.94x = 4,731,101,042.66
  5. Step 5: Solve for x
    x = 4,731,101,042.66/79,138.94
  6. Step 6: Final answer
    x = 59,782.21

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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.