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Finding the Fourth Proportional to 81,369.30, 122,054.74 and 39,239.58

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Solution

The fourth proportional to 81,369.30, 122,054.74 and 39,239.58 is: 58,859.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,369.30 : 122,054.74 = 39,239.58 : x
  2. Step 2: Convert to fraction form
    81,369.30/122,054.74 = 39,239.58/x
  3. Step 3: Cross multiply
    81,369.30x = 122,054.74 × 39,239.58
  4. Step 4: Simplify right side
    81,369.30x = 4,789,376,734.61
  5. Step 5: Solve for x
    x = 4,789,376,734.61/81,369.30
  6. Step 6: Final answer
    x = 58,859.75

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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.