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Finding the Fourth Proportional to 62,252.72, 93,388.80 and 20,690

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Solution

The fourth proportional to 62,252.72, 93,388.80 and 20,690 is: 31,038.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,252.72 : 93,388.80 = 20,690 : x
  2. Step 2: Convert to fraction form
    62,252.72/93,388.80 = 20,690/x
  3. Step 3: Cross multiply
    62,252.72x = 93,388.80 × 20,690
  4. Step 4: Simplify right side
    62,252.72x = 1,932,214,272
  5. Step 5: Solve for x
    x = 1,932,214,272/62,252.72
  6. Step 6: Final answer
    x = 31,038.23

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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.