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Finding the Fourth Proportional to 186,809.69, 280,078.74 and 74,456.21

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Solution

The fourth proportional to 186,809.69, 280,078.74 and 74,456.21 is: 111,630.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,809.69 : 280,078.74 = 74,456.21 : x
  2. Step 2: Convert to fraction form
    186,809.69/280,078.74 = 74,456.21/x
  3. Step 3: Cross multiply
    186,809.69x = 280,078.74 × 74,456.21
  4. Step 4: Simplify right side
    186,809.69x = 20,853,600,081.58
  5. Step 5: Solve for x
    x = 20,853,600,081.58/186,809.69
  6. Step 6: Final answer
    x = 111,630.19

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1.5x scale

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.