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Finding the Fourth Proportional to 62,278.80, 93,418.20 and 20,725.80

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Solution

The fourth proportional to 62,278.80, 93,418.20 and 20,725.80 is: 31,088.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,278.80 : 93,418.20 = 20,725.80 : x
  2. Step 2: Convert to fraction form
    62,278.80/93,418.20 = 20,725.80/x
  3. Step 3: Cross multiply
    62,278.80x = 93,418.20 × 20,725.80
  4. Step 4: Simplify right side
    62,278.80x = 1,936,166,929.56
  5. Step 5: Solve for x
    x = 1,936,166,929.56/62,278.80
  6. Step 6: Final answer
    x = 31,088.70

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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.