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Finding the Fourth Proportional to 61,343.42, 91,960.43 and 21,891.78

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Solution

The fourth proportional to 61,343.42, 91,960.43 and 21,891.78 is: 32,818.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,343.42 : 91,960.43 = 21,891.78 : x
  2. Step 2: Convert to fraction form
    61,343.42/91,960.43 = 21,891.78/x
  3. Step 3: Cross multiply
    61,343.42x = 91,960.43 × 21,891.78
  4. Step 4: Simplify right side
    61,343.42x = 2,013,177,392.81
  5. Step 5: Solve for x
    x = 2,013,177,392.81/61,343.42
  6. Step 6: Final answer
    x = 32,818.15

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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.