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Finding the Fourth Proportional to 68,354.60, 102,512.70 and 21,621.80

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Solution

The fourth proportional to 68,354.60, 102,512.70 and 21,621.80 is: 32,426.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,354.60 : 102,512.70 = 21,621.80 : x
  2. Step 2: Convert to fraction form
    68,354.60/102,512.70 = 21,621.80/x
  3. Step 3: Cross multiply
    68,354.60x = 102,512.70 × 21,621.80
  4. Step 4: Simplify right side
    68,354.60x = 2,216,509,096.86
  5. Step 5: Solve for x
    x = 2,216,509,096.86/68,354.60
  6. Step 6: Final answer
    x = 32,426.63

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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.