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Finding the Fourth Proportional to 71,721.88, 107,407.50 and 61,924.12

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Solution

The fourth proportional to 71,721.88, 107,407.50 and 61,924.12 is: 92,734.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,721.88 : 107,407.50 = 61,924.12 : x
  2. Step 2: Convert to fraction form
    71,721.88/107,407.50 = 61,924.12/x
  3. Step 3: Cross multiply
    71,721.88x = 107,407.50 × 61,924.12
  4. Step 4: Simplify right side
    71,721.88x = 6,651,114,918.90
  5. Step 5: Solve for x
    x = 6,651,114,918.90/71,721.88
  6. Step 6: Final answer
    x = 92,734.81

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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.