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Finding the Fourth Proportional to 62,999.68, 86,923.84 and 40,021.12

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Solution

The fourth proportional to 62,999.68, 86,923.84 and 40,021.12 is: 55,219.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,999.68 : 86,923.84 = 40,021.12 : x
  2. Step 2: Convert to fraction form
    62,999.68/86,923.84 = 40,021.12/x
  3. Step 3: Cross multiply
    62,999.68x = 86,923.84 × 40,021.12
  4. Step 4: Simplify right side
    62,999.68x = 3,478,789,431.50
  5. Step 5: Solve for x
    x = 3,478,789,431.50/62,999.68
  6. Step 6: Final answer
    x = 55,219.16

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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.