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Finding the Fourth Proportional to 68,697.90, 102,894.60 and 52,785.80

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Solution

The fourth proportional to 68,697.90, 102,894.60 and 52,785.80 is: 79,061.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,697.90 : 102,894.60 = 52,785.80 : x
  2. Step 2: Convert to fraction form
    68,697.90/102,894.60 = 52,785.80/x
  3. Step 3: Cross multiply
    68,697.90x = 102,894.60 × 52,785.80
  4. Step 4: Simplify right side
    68,697.90x = 5,431,373,776.68
  5. Step 5: Solve for x
    x = 5,431,373,776.68/68,697.90
  6. Step 6: Final answer
    x = 79,061.71

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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.