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Finding the Fourth Proportional to 68,549.66, 102,786.28 and 21,151.29

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Solution

The fourth proportional to 68,549.66, 102,786.28 and 21,151.29 is: 31,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,549.66 : 102,786.28 = 21,151.29 : x
  2. Step 2: Convert to fraction form
    68,549.66/102,786.28 = 21,151.29/x
  3. Step 3: Cross multiply
    68,549.66x = 102,786.28 × 21,151.29
  4. Step 4: Simplify right side
    68,549.66x = 2,174,062,416.30
  5. Step 5: Solve for x
    x = 2,174,062,416.30/68,549.66
  6. Step 6: Final answer
    x = 31,715.15

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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.