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Finding the Fourth Proportional to 186,813.72, 280,199.88 and 66,865.86

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Solution

The fourth proportional to 186,813.72, 280,199.88 and 66,865.86 is: 100,291.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,813.72 : 280,199.88 = 66,865.86 : x
  2. Step 2: Convert to fraction form
    186,813.72/280,199.88 = 66,865.86/x
  3. Step 3: Cross multiply
    186,813.72x = 280,199.88 × 66,865.86
  4. Step 4: Simplify right side
    186,813.72x = 18,735,805,948.10
  5. Step 5: Solve for x
    x = 18,735,805,948.10/186,813.72
  6. Step 6: Final answer
    x = 100,291.38

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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.