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Finding the Fourth Proportional to 62,942.80, 94,414.20 and 21,389.80

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Solution

The fourth proportional to 62,942.80, 94,414.20 and 21,389.80 is: 32,084.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,942.80 : 94,414.20 = 21,389.80 : x
  2. Step 2: Convert to fraction form
    62,942.80/94,414.20 = 21,389.80/x
  3. Step 3: Cross multiply
    62,942.80x = 94,414.20 × 21,389.80
  4. Step 4: Simplify right side
    62,942.80x = 2,019,500,855.16
  5. Step 5: Solve for x
    x = 2,019,500,855.16/62,942.80
  6. Step 6: Final answer
    x = 32,084.70

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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.