Home / 68,135.16-102,219.20-21,388.04

Finding the Fourth Proportional to 68,135.16, 102,219.20 and 21,388.04

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Solution

The fourth proportional to 68,135.16, 102,219.20 and 21,388.04 is: 32,087.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,135.16 : 102,219.20 = 21,388.04 : x
  2. Step 2: Convert to fraction form
    68,135.16/102,219.20 = 21,388.04/x
  3. Step 3: Cross multiply
    68,135.16x = 102,219.20 × 21,388.04
  4. Step 4: Simplify right side
    68,135.16x = 2,186,267,720.33
  5. Step 5: Solve for x
    x = 2,186,267,720.33/68,135.16
  6. Step 6: Final answer
    x = 32,087.22

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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.