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Finding the Fourth Proportional to 68,381.61, 102,572.48 and 18,461.68

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Solution

The fourth proportional to 68,381.61, 102,572.48 and 18,461.68 is: 27,692.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,381.61 : 102,572.48 = 18,461.68 : x
  2. Step 2: Convert to fraction form
    68,381.61/102,572.48 = 18,461.68/x
  3. Step 3: Cross multiply
    68,381.61x = 102,572.48 × 18,461.68
  4. Step 4: Simplify right side
    68,381.61x = 1,893,660,302.57
  5. Step 5: Solve for x
    x = 1,893,660,302.57/68,381.61
  6. Step 6: Final answer
    x = 27,692.54

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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.