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Finding the Fourth Proportional to 61,161.41, 91,755.93 and 21,718.55

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Solution

The fourth proportional to 61,161.41, 91,755.93 and 21,718.55 is: 32,582.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,161.41 : 91,755.93 = 21,718.55 : x
  2. Step 2: Convert to fraction form
    61,161.41/91,755.93 = 21,718.55/x
  3. Step 3: Cross multiply
    61,161.41x = 91,755.93 × 21,718.55
  4. Step 4: Simplify right side
    61,161.41x = 1,992,805,753.50
  5. Step 5: Solve for x
    x = 1,992,805,753.50/61,161.41
  6. Step 6: Final answer
    x = 32,582.73

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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.