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Finding the Fourth Proportional to 79,084.81, 109,138.80 and 43,274.80

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Solution

The fourth proportional to 79,084.81, 109,138.80 and 43,274.80 is: 59,720.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,084.81 : 109,138.80 = 43,274.80 : x
  2. Step 2: Convert to fraction form
    79,084.81/109,138.80 = 43,274.80/x
  3. Step 3: Cross multiply
    79,084.81x = 109,138.80 × 43,274.80
  4. Step 4: Simplify right side
    79,084.81x = 4,722,959,742.24
  5. Step 5: Solve for x
    x = 4,722,959,742.24/79,084.81
  6. Step 6: Final answer
    x = 59,720.19

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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.