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Finding the Fourth Proportional to 75,615.72, 104,355.72 and 43,785.18

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Solution

The fourth proportional to 75,615.72, 104,355.72 and 43,785.18 is: 60,427.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,615.72 : 104,355.72 = 43,785.18 : x
  2. Step 2: Convert to fraction form
    75,615.72/104,355.72 = 43,785.18/x
  3. Step 3: Cross multiply
    75,615.72x = 104,355.72 × 43,785.18
  4. Step 4: Simplify right side
    75,615.72x = 4,569,233,984.23
  5. Step 5: Solve for x
    x = 4,569,233,984.23/75,615.72
  6. Step 6: Final answer
    x = 60,427.04

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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.