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Finding the Fourth Proportional to 71,053.80, 106,375.90 and 43,405.80

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Solution

The fourth proportional to 71,053.80, 106,375.90 and 43,405.80 is: 64,983.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,053.80 : 106,375.90 = 43,405.80 : x
  2. Step 2: Convert to fraction form
    71,053.80/106,375.90 = 43,405.80/x
  3. Step 3: Cross multiply
    71,053.80x = 106,375.90 × 43,405.80
  4. Step 4: Simplify right side
    71,053.80x = 4,617,331,040.22
  5. Step 5: Solve for x
    x = 4,617,331,040.22/71,053.80
  6. Step 6: Final answer
    x = 64,983.59

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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.