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Finding the Fourth Proportional to 69,456, 104,239.86 and 36,186

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Solution

The fourth proportional to 69,456, 104,239.86 and 36,186 is: 54,308.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,456 : 104,239.86 = 36,186 : x
  2. Step 2: Convert to fraction form
    69,456/104,239.86 = 36,186/x
  3. Step 3: Cross multiply
    69,456x = 104,239.86 × 36,186
  4. Step 4: Simplify right side
    69,456x = 3,772,023,573.96
  5. Step 5: Solve for x
    x = 3,772,023,573.96/69,456
  6. Step 6: Final answer
    x = 54,308.10

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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.