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Finding the Fourth Proportional to 68,620.20, 102,728.70 and 51,167.40

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Solution

The fourth proportional to 68,620.20, 102,728.70 and 51,167.40 is: 76,600.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,620.20 : 102,728.70 = 51,167.40 : x
  2. Step 2: Convert to fraction form
    68,620.20/102,728.70 = 51,167.40/x
  3. Step 3: Cross multiply
    68,620.20x = 102,728.70 × 51,167.40
  4. Step 4: Simplify right side
    68,620.20x = 5,256,360,484.38
  5. Step 5: Solve for x
    x = 5,256,360,484.38/68,620.20
  6. Step 6: Final answer
    x = 76,600.77

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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.