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Finding the Fourth Proportional to 98,788.68, 136,372.14 and 63,025.56

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Solution

The fourth proportional to 98,788.68, 136,372.14 and 63,025.56 is: 87,003.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,788.68 : 136,372.14 = 63,025.56 : x
  2. Step 2: Convert to fraction form
    98,788.68/136,372.14 = 63,025.56/x
  3. Step 3: Cross multiply
    98,788.68x = 136,372.14 × 63,025.56
  4. Step 4: Simplify right side
    98,788.68x = 8,594,930,491.90
  5. Step 5: Solve for x
    x = 8,594,930,491.90/98,788.68
  6. Step 6: Final answer
    x = 87,003.19

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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.