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Finding the Fourth Proportional to 61,981.52, 85,532.97 and 36,144.78

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Solution

The fourth proportional to 61,981.52, 85,532.97 and 36,144.78 is: 49,878.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,981.52 : 85,532.97 = 36,144.78 : x
  2. Step 2: Convert to fraction form
    61,981.52/85,532.97 = 36,144.78/x
  3. Step 3: Cross multiply
    61,981.52x = 85,532.97 × 36,144.78
  4. Step 4: Simplify right side
    61,981.52x = 3,091,570,383.40
  5. Step 5: Solve for x
    x = 3,091,570,383.40/61,981.52
  6. Step 6: Final answer
    x = 49,878.91

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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.