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Finding the Fourth Proportional to 68,720.88, 102,906.30 and 45,276.24

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Solution

The fourth proportional to 68,720.88, 102,906.30 and 45,276.24 is: 67,799.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,720.88 : 102,906.30 = 45,276.24 : x
  2. Step 2: Convert to fraction form
    68,720.88/102,906.30 = 45,276.24/x
  3. Step 3: Cross multiply
    68,720.88x = 102,906.30 × 45,276.24
  4. Step 4: Simplify right side
    68,720.88x = 4,659,210,336.31
  5. Step 5: Solve for x
    x = 4,659,210,336.31/68,720.88
  6. Step 6: Final answer
    x = 67,799.05

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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.