Home / 68,486.38-102,739.32-21,105.36

Finding the Fourth Proportional to 68,486.38, 102,739.32 and 21,105.36

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Solution

The fourth proportional to 68,486.38, 102,739.32 and 21,105.36 is: 31,661.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,486.38 : 102,739.32 = 21,105.36 : x
  2. Step 2: Convert to fraction form
    68,486.38/102,739.32 = 21,105.36/x
  3. Step 3: Cross multiply
    68,486.38x = 102,739.32 × 21,105.36
  4. Step 4: Simplify right side
    68,486.38x = 2,168,350,334.76
  5. Step 5: Solve for x
    x = 2,168,350,334.76/68,486.38
  6. Step 6: Final answer
    x = 31,661.05

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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.