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Finding the Fourth Proportional to 186,890.80, 280,336.20 and 154,085.80

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Solution

The fourth proportional to 186,890.80, 280,336.20 and 154,085.80 is: 231,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,890.80 : 280,336.20 = 154,085.80 : x
  2. Step 2: Convert to fraction form
    186,890.80/280,336.20 = 154,085.80/x
  3. Step 3: Cross multiply
    186,890.80x = 280,336.20 × 154,085.80
  4. Step 4: Simplify right side
    186,890.80x = 43,195,827,645.96
  5. Step 5: Solve for x
    x = 43,195,827,645.96/186,890.80
  6. Step 6: Final answer
    x = 231,128.70

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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.