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Finding the Fourth Proportional to 74,688.64, 112,110.40 and 33,164.80

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Solution

The fourth proportional to 74,688.64, 112,110.40 and 33,164.80 is: 49,781.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,688.64 : 112,110.40 = 33,164.80 : x
  2. Step 2: Convert to fraction form
    74,688.64/112,110.40 = 33,164.80/x
  3. Step 3: Cross multiply
    74,688.64x = 112,110.40 × 33,164.80
  4. Step 4: Simplify right side
    74,688.64x = 3,718,118,993.92
  5. Step 5: Solve for x
    x = 3,718,118,993.92/74,688.64
  6. Step 6: Final answer
    x = 49,781.59

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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.