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Finding the Fourth Proportional to 74,794.18, 112,162.11 and 28,021.54

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Solution

The fourth proportional to 74,794.18, 112,162.11 and 28,021.54 is: 42,021.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,794.18 : 112,162.11 = 28,021.54 : x
  2. Step 2: Convert to fraction form
    74,794.18/112,162.11 = 28,021.54/x
  3. Step 3: Cross multiply
    74,794.18x = 112,162.11 × 28,021.54
  4. Step 4: Simplify right side
    74,794.18x = 3,142,955,051.85
  5. Step 5: Solve for x
    x = 3,142,955,051.85/74,794.18
  6. Step 6: Final answer
    x = 42,021.39

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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.