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Finding the Fourth Proportional to 68,078.56, 102,062.76 and 30,611.20

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Solution

The fourth proportional to 68,078.56, 102,062.76 and 30,611.20 is: 45,892.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,078.56 : 102,062.76 = 30,611.20 : x
  2. Step 2: Convert to fraction form
    68,078.56/102,062.76 = 30,611.20/x
  3. Step 3: Cross multiply
    68,078.56x = 102,062.76 × 30,611.20
  4. Step 4: Simplify right side
    68,078.56x = 3,124,263,558.91
  5. Step 5: Solve for x
    x = 3,124,263,558.91/68,078.56
  6. Step 6: Final answer
    x = 45,892.03

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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.