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Finding the Fourth Proportional to 57,809.10, 86,719.41 and 15,689.87

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Solution

The fourth proportional to 57,809.10, 86,719.41 and 15,689.87 is: 23,536.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,809.10 : 86,719.41 = 15,689.87 : x
  2. Step 2: Convert to fraction form
    57,809.10/86,719.41 = 15,689.87/x
  3. Step 3: Cross multiply
    57,809.10x = 86,719.41 × 15,689.87
  4. Step 4: Simplify right side
    57,809.10x = 1,360,615,835.78
  5. Step 5: Solve for x
    x = 1,360,615,835.78/57,809.10
  6. Step 6: Final answer
    x = 23,536.36

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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.