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Finding the Fourth Proportional to 68,340.19, 102,498.61 and 18,408.61

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Solution

The fourth proportional to 68,340.19, 102,498.61 and 18,408.61 is: 27,609.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,340.19 : 102,498.61 = 18,408.61 : x
  2. Step 2: Convert to fraction form
    68,340.19/102,498.61 = 18,408.61/x
  3. Step 3: Cross multiply
    68,340.19x = 102,498.61 × 18,408.61
  4. Step 4: Simplify right side
    68,340.19x = 1,886,857,001.88
  5. Step 5: Solve for x
    x = 1,886,857,001.88/68,340.19
  6. Step 6: Final answer
    x = 27,609.77

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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.