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Finding the Fourth Proportional to 186,643.20, 280,000.80 and 80,025.60

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Solution

The fourth proportional to 186,643.20, 280,000.80 and 80,025.60 is: 120,053.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,643.20 : 280,000.80 = 80,025.60 : x
  2. Step 2: Convert to fraction form
    186,643.20/280,000.80 = 80,025.60/x
  3. Step 3: Cross multiply
    186,643.20x = 280,000.80 × 80,025.60
  4. Step 4: Simplify right side
    186,643.20x = 22,407,232,020.48
  5. Step 5: Solve for x
    x = 22,407,232,020.48/186,643.20
  6. Step 6: Final answer
    x = 120,053.84

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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.