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Finding the Fourth Proportional to 68,411.79, 102,623.58 and 18,491.67

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Solution

The fourth proportional to 68,411.79, 102,623.58 and 18,491.67 is: 27,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,411.79 : 102,623.58 = 18,491.67 : x
  2. Step 2: Convert to fraction form
    68,411.79/102,623.58 = 18,491.67/x
  3. Step 3: Cross multiply
    68,411.79x = 102,623.58 × 18,491.67
  4. Step 4: Simplify right side
    68,411.79x = 1,897,681,375.58
  5. Step 5: Solve for x
    x = 1,897,681,375.58/68,411.79
  6. Step 6: Final answer
    x = 27,739.10

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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.