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Finding the Fourth Proportional to 68,443.61, 102,580.65 and 38,771.48

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Solution

The fourth proportional to 68,443.61, 102,580.65 and 38,771.48 is: 58,109.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,443.61 : 102,580.65 = 38,771.48 : x
  2. Step 2: Convert to fraction form
    68,443.61/102,580.65 = 38,771.48/x
  3. Step 3: Cross multiply
    68,443.61x = 102,580.65 × 38,771.48
  4. Step 4: Simplify right side
    68,443.61x = 3,977,203,876.31
  5. Step 5: Solve for x
    x = 3,977,203,876.31/68,443.61
  6. Step 6: Final answer
    x = 58,109.21

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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.