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Finding the Fourth Proportional to 113,107.71, 156,107.84 and 65,388.81

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Solution

The fourth proportional to 113,107.71, 156,107.84 and 65,388.81 is: 90,247.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,107.71 : 156,107.84 = 65,388.81 : x
  2. Step 2: Convert to fraction form
    113,107.71/156,107.84 = 65,388.81/x
  3. Step 3: Cross multiply
    113,107.71x = 156,107.84 × 65,388.81
  4. Step 4: Simplify right side
    113,107.71x = 10,207,705,562.33
  5. Step 5: Solve for x
    x = 10,207,705,562.33/113,107.71
  6. Step 6: Final answer
    x = 90,247.65

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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.