Home / 68,139.66-102,219.26-18,221.43

Finding the Fourth Proportional to 68,139.66, 102,219.26 and 18,221.43

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Solution

The fourth proportional to 68,139.66, 102,219.26 and 18,221.43 is: 27,334.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,139.66 : 102,219.26 = 18,221.43 : x
  2. Step 2: Convert to fraction form
    68,139.66/102,219.26 = 18,221.43/x
  3. Step 3: Cross multiply
    68,139.66x = 102,219.26 × 18,221.43
  4. Step 4: Simplify right side
    68,139.66x = 1,862,580,999.63
  5. Step 5: Solve for x
    x = 1,862,580,999.63/68,139.66
  6. Step 6: Final answer
    x = 27,334.76

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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.