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Finding the Fourth Proportional to 71,720.88, 107,406 and 61,923.12

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Solution

The fourth proportional to 71,720.88, 107,406 and 61,923.12 is: 92,733.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,720.88 : 107,406 = 61,923.12 : x
  2. Step 2: Convert to fraction form
    71,720.88/107,406 = 61,923.12/x
  3. Step 3: Cross multiply
    71,720.88x = 107,406 × 61,923.12
  4. Step 4: Simplify right side
    71,720.88x = 6,650,914,626.72
  5. Step 5: Solve for x
    x = 6,650,914,626.72/71,720.88
  6. Step 6: Final answer
    x = 92,733.31

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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.