Home / 68,187.10-102,286.56-20,812.84

Finding the Fourth Proportional to 68,187.10, 102,286.56 and 20,812.84

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Solution

The fourth proportional to 68,187.10, 102,286.56 and 20,812.84 is: 31,221.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,187.10 : 102,286.56 = 20,812.84 : x
  2. Step 2: Convert to fraction form
    68,187.10/102,286.56 = 20,812.84/x
  3. Step 3: Cross multiply
    68,187.10x = 102,286.56 × 20,812.84
  4. Step 4: Simplify right side
    68,187.10x = 2,128,873,807.43
  5. Step 5: Solve for x
    x = 2,128,873,807.43/68,187.10
  6. Step 6: Final answer
    x = 31,221.06

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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.