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Finding the Fourth Proportional to 68,568.60, 102,860.28 and 21,810.54

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Solution

The fourth proportional to 68,568.60, 102,860.28 and 21,810.54 is: 32,718.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,568.60 : 102,860.28 = 21,810.54 : x
  2. Step 2: Convert to fraction form
    68,568.60/102,860.28 = 21,810.54/x
  3. Step 3: Cross multiply
    68,568.60x = 102,860.28 × 21,810.54
  4. Step 4: Simplify right side
    68,568.60x = 2,243,438,251.35
  5. Step 5: Solve for x
    x = 2,243,438,251.35/68,568.60
  6. Step 6: Final answer
    x = 32,718.16

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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.