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Finding the Fourth Proportional to 71,963.60, 107,999.40 and 36,885.20

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Solution

The fourth proportional to 71,963.60, 107,999.40 and 36,885.20 is: 55,355.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,963.60 : 107,999.40 = 36,885.20 : x
  2. Step 2: Convert to fraction form
    71,963.60/107,999.40 = 36,885.20/x
  3. Step 3: Cross multiply
    71,963.60x = 107,999.40 × 36,885.20
  4. Step 4: Simplify right side
    71,963.60x = 3,983,579,468.88
  5. Step 5: Solve for x
    x = 3,983,579,468.88/71,963.60
  6. Step 6: Final answer
    x = 55,355.48

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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.