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Finding the Fourth Proportional to 66,838.25, 92,236.81 and 39,981.89

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Solution

The fourth proportional to 66,838.25, 92,236.81 and 39,981.89 is: 55,175.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,838.25 : 92,236.81 = 39,981.89 : x
  2. Step 2: Convert to fraction form
    66,838.25/92,236.81 = 39,981.89/x
  3. Step 3: Cross multiply
    66,838.25x = 92,236.81 × 39,981.89
  4. Step 4: Simplify right side
    66,838.25x = 3,687,801,791.46
  5. Step 5: Solve for x
    x = 3,687,801,791.46/66,838.25
  6. Step 6: Final answer
    x = 55,175.02

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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.