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Finding the Fourth Proportional to 68,610.20, 102,713.70 and 51,157.40

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Solution

The fourth proportional to 68,610.20, 102,713.70 and 51,157.40 is: 76,585.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,610.20 : 102,713.70 = 51,157.40 : x
  2. Step 2: Convert to fraction form
    68,610.20/102,713.70 = 51,157.40/x
  3. Step 3: Cross multiply
    68,610.20x = 102,713.70 × 51,157.40
  4. Step 4: Simplify right side
    68,610.20x = 5,254,565,836.38
  5. Step 5: Solve for x
    x = 5,254,565,836.38/68,610.20
  6. Step 6: Final answer
    x = 76,585.78

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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.