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Finding the Fourth Proportional to 68,581.70, 102,862.16 and 18,665.69

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Solution

The fourth proportional to 68,581.70, 102,862.16 and 18,665.69 is: 27,995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,581.70 : 102,862.16 = 18,665.69 : x
  2. Step 2: Convert to fraction form
    68,581.70/102,862.16 = 18,665.69/x
  3. Step 3: Cross multiply
    68,581.70x = 102,862.16 × 18,665.69
  4. Step 4: Simplify right side
    68,581.70x = 1,919,992,887.47
  5. Step 5: Solve for x
    x = 1,919,992,887.47/68,581.70
  6. Step 6: Final answer
    x = 27,995.70

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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.