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Finding the Fourth Proportional to 68,714.60, 103,071.90 and 21,972.20

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Solution

The fourth proportional to 68,714.60, 103,071.90 and 21,972.20 is: 32,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,714.60 : 103,071.90 = 21,972.20 : x
  2. Step 2: Convert to fraction form
    68,714.60/103,071.90 = 21,972.20/x
  3. Step 3: Cross multiply
    68,714.60x = 103,071.90 × 21,972.20
  4. Step 4: Simplify right side
    68,714.60x = 2,264,716,401.18
  5. Step 5: Solve for x
    x = 2,264,716,401.18/68,714.60
  6. Step 6: Final answer
    x = 32,958.30

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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.