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Finding the Fourth Proportional to 71,983.80, 107,975.70 and 43,443.45

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Solution

The fourth proportional to 71,983.80, 107,975.70 and 43,443.45 is: 65,165.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,983.80 : 107,975.70 = 43,443.45 : x
  2. Step 2: Convert to fraction form
    71,983.80/107,975.70 = 43,443.45/x
  3. Step 3: Cross multiply
    71,983.80x = 107,975.70 × 43,443.45
  4. Step 4: Simplify right side
    71,983.80x = 4,690,836,924.17
  5. Step 5: Solve for x
    x = 4,690,836,924.17/71,983.80
  6. Step 6: Final answer
    x = 65,165.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.