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Finding the Fourth Proportional to 61,821.90, 92,740.11 and 19,687.23

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Solution

The fourth proportional to 61,821.90, 92,740.11 and 19,687.23 is: 29,533.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,821.90 : 92,740.11 = 19,687.23 : x
  2. Step 2: Convert to fraction form
    61,821.90/92,740.11 = 19,687.23/x
  3. Step 3: Cross multiply
    61,821.90x = 92,740.11 × 19,687.23
  4. Step 4: Simplify right side
    61,821.90x = 1,825,795,875.80
  5. Step 5: Solve for x
    x = 1,825,795,875.80/61,821.90
  6. Step 6: Final answer
    x = 29,533.16

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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.