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Finding the Fourth Proportional to 71,862.37, 107,711.81 and 43,720.39

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Solution

The fourth proportional to 71,862.37, 107,711.81 and 43,720.39 is: 65,530.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,862.37 : 107,711.81 = 43,720.39 : x
  2. Step 2: Convert to fraction form
    71,862.37/107,711.81 = 43,720.39/x
  3. Step 3: Cross multiply
    71,862.37x = 107,711.81 × 43,720.39
  4. Step 4: Simplify right side
    71,862.37x = 4,709,202,340.81
  5. Step 5: Solve for x
    x = 4,709,202,340.81/71,862.37
  6. Step 6: Final answer
    x = 65,530.85

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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.