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Finding the Fourth Proportional to 189,281.39, 261,207.80 and 108,714.12

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Solution

The fourth proportional to 189,281.39, 261,207.80 and 108,714.12 is: 150,025.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,281.39 : 261,207.80 = 108,714.12 : x
  2. Step 2: Convert to fraction form
    189,281.39/261,207.80 = 108,714.12/x
  3. Step 3: Cross multiply
    189,281.39x = 261,207.80 × 108,714.12
  4. Step 4: Simplify right side
    189,281.39x = 28,396,975,570.57
  5. Step 5: Solve for x
    x = 28,396,975,570.57/189,281.39
  6. Step 6: Final answer
    x = 150,025.19

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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.