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Finding the Fourth Proportional to 71,382.10, 106,943.55 and 43,647.70

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Solution

The fourth proportional to 71,382.10, 106,943.55 and 43,647.70 is: 65,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,382.10 : 106,943.55 = 43,647.70 : x
  2. Step 2: Convert to fraction form
    71,382.10/106,943.55 = 43,647.70/x
  3. Step 3: Cross multiply
    71,382.10x = 106,943.55 × 43,647.70
  4. Step 4: Simplify right side
    71,382.10x = 4,667,839,987.34
  5. Step 5: Solve for x
    x = 4,667,839,987.34/71,382.10
  6. Step 6: Final answer
    x = 65,392.30

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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.