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Finding the Fourth Proportional to 68,181.56, 102,278.25 and 20,807.32

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Solution

The fourth proportional to 68,181.56, 102,278.25 and 20,807.32 is: 31,212.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,181.56 : 102,278.25 = 20,807.32 : x
  2. Step 2: Convert to fraction form
    68,181.56/102,278.25 = 20,807.32/x
  3. Step 3: Cross multiply
    68,181.56x = 102,278.25 × 20,807.32
  4. Step 4: Simplify right side
    68,181.56x = 2,128,136,111.03
  5. Step 5: Solve for x
    x = 2,128,136,111.03/68,181.56
  6. Step 6: Final answer
    x = 31,212.78

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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.