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Finding the Fourth Proportional to 68,057.28, 102,081.60 and 21,309.12

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Solution

The fourth proportional to 68,057.28, 102,081.60 and 21,309.12 is: 31,962.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,057.28 : 102,081.60 = 21,309.12 : x
  2. Step 2: Convert to fraction form
    68,057.28/102,081.60 = 21,309.12/x
  3. Step 3: Cross multiply
    68,057.28x = 102,081.60 × 21,309.12
  4. Step 4: Simplify right side
    68,057.28x = 2,175,269,064.19
  5. Step 5: Solve for x
    x = 2,175,269,064.19/68,057.28
  6. Step 6: Final answer
    x = 31,962.33

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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.