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Finding the Fourth Proportional to 68,181.81, 102,278.64 and 20,807.58

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Solution

The fourth proportional to 68,181.81, 102,278.64 and 20,807.58 is: 31,213.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,181.81 : 102,278.64 = 20,807.58 : x
  2. Step 2: Convert to fraction form
    68,181.81/102,278.64 = 20,807.58/x
  3. Step 3: Cross multiply
    68,181.81x = 102,278.64 × 20,807.58
  4. Step 4: Simplify right side
    68,181.81x = 2,128,170,783.80
  5. Step 5: Solve for x
    x = 2,128,170,783.80/68,181.81
  6. Step 6: Final answer
    x = 31,213.17

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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.