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Finding the Fourth Proportional to 65,620.63, 90,556.47 and 35,812.63

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Solution

The fourth proportional to 65,620.63, 90,556.47 and 35,812.63 is: 49,421.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.63 : 90,556.47 = 35,812.63 : x
  2. Step 2: Convert to fraction form
    65,620.63/90,556.47 = 35,812.63/x
  3. Step 3: Cross multiply
    65,620.63x = 90,556.47 × 35,812.63
  4. Step 4: Simplify right side
    65,620.63x = 3,243,064,722.37
  5. Step 5: Solve for x
    x = 3,243,064,722.37/65,620.63
  6. Step 6: Final answer
    x = 49,421.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.