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Finding the Fourth Proportional to 68,638.55, 103,024.40 and 33,124.86

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Solution

The fourth proportional to 68,638.55, 103,024.40 and 33,124.86 is: 49,719.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,638.55 : 103,024.40 = 33,124.86 : x
  2. Step 2: Convert to fraction form
    68,638.55/103,024.40 = 33,124.86/x
  3. Step 3: Cross multiply
    68,638.55x = 103,024.40 × 33,124.86
  4. Step 4: Simplify right side
    68,638.55x = 3,412,668,660.96
  5. Step 5: Solve for x
    x = 3,412,668,660.96/68,638.55
  6. Step 6: Final answer
    x = 49,719.42

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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.