Home / 68,143.09-102,218.96-21,397.81

Finding the Fourth Proportional to 68,143.09, 102,218.96 and 21,397.81

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Solution

The fourth proportional to 68,143.09, 102,218.96 and 21,397.81 is: 32,098.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,143.09 : 102,218.96 = 21,397.81 : x
  2. Step 2: Convert to fraction form
    68,143.09/102,218.96 = 21,397.81/x
  3. Step 3: Cross multiply
    68,143.09x = 102,218.96 × 21,397.81
  4. Step 4: Simplify right side
    68,143.09x = 2,187,261,884.48
  5. Step 5: Solve for x
    x = 2,187,261,884.48/68,143.09
  6. Step 6: Final answer
    x = 32,098.07

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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.