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Finding the Fourth Proportional to 68,131.30, 102,002.55 and 66,187.30

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Solution

The fourth proportional to 68,131.30, 102,002.55 and 66,187.30 is: 99,092.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,131.30 : 102,002.55 = 66,187.30 : x
  2. Step 2: Convert to fraction form
    68,131.30/102,002.55 = 66,187.30/x
  3. Step 3: Cross multiply
    68,131.30x = 102,002.55 × 66,187.30
  4. Step 4: Simplify right side
    68,131.30x = 6,751,273,377.62
  5. Step 5: Solve for x
    x = 6,751,273,377.62/68,131.30
  6. Step 6: Final answer
    x = 99,092.10

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1.5x scale

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.