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Finding the Fourth Proportional to 113,703.86, 170,556.27 and 74,279.54

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Solution

The fourth proportional to 113,703.86, 170,556.27 and 74,279.54 is: 111,419.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,703.86 : 170,556.27 = 74,279.54 : x
  2. Step 2: Convert to fraction form
    113,703.86/170,556.27 = 74,279.54/x
  3. Step 3: Cross multiply
    113,703.86x = 170,556.27 × 74,279.54
  4. Step 4: Simplify right side
    113,703.86x = 12,668,841,279.72
  5. Step 5: Solve for x
    x = 12,668,841,279.72/113,703.86
  6. Step 6: Final answer
    x = 111,419.62

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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.