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Finding the Fourth Proportional to 186,855.40, 280,196.70 and 81,620.20

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Solution

The fourth proportional to 186,855.40, 280,196.70 and 81,620.20 is: 122,392.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,855.40 : 280,196.70 = 81,620.20 : x
  2. Step 2: Convert to fraction form
    186,855.40/280,196.70 = 81,620.20/x
  3. Step 3: Cross multiply
    186,855.40x = 280,196.70 × 81,620.20
  4. Step 4: Simplify right side
    186,855.40x = 22,869,710,693.34
  5. Step 5: Solve for x
    x = 22,869,710,693.34/186,855.40
  6. Step 6: Final answer
    x = 122,392.56

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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.