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Finding the Fourth Proportional to 85,481.73, 117,981.08 and 56,358.96

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Solution

The fourth proportional to 85,481.73, 117,981.08 and 56,358.96 is: 77,786.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,481.73 : 117,981.08 = 56,358.96 : x
  2. Step 2: Convert to fraction form
    85,481.73/117,981.08 = 56,358.96/x
  3. Step 3: Cross multiply
    85,481.73x = 117,981.08 × 56,358.96
  4. Step 4: Simplify right side
    85,481.73x = 6,649,291,109.37
  5. Step 5: Solve for x
    x = 6,649,291,109.37/85,481.73
  6. Step 6: Final answer
    x = 77,786.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.