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Finding the Fourth Proportional to 68,210.80, 102,316.20 and 34,919.80

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Solution

The fourth proportional to 68,210.80, 102,316.20 and 34,919.80 is: 52,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,210.80 : 102,316.20 = 34,919.80 : x
  2. Step 2: Convert to fraction form
    68,210.80/102,316.20 = 34,919.80/x
  3. Step 3: Cross multiply
    68,210.80x = 102,316.20 × 34,919.80
  4. Step 4: Simplify right side
    68,210.80x = 3,572,861,240.76
  5. Step 5: Solve for x
    x = 3,572,861,240.76/68,210.80
  6. Step 6: Final answer
    x = 52,379.70

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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.