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Finding the Fourth Proportional to 186,879,766.80, 280,317,025.80 and 84,643,640.40

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Solution

The fourth proportional to 186,879,766.80, 280,317,025.80 and 84,643,640.40 is: 126,964,271.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,879,766.80 : 280,317,025.80 = 84,643,640.40 : x
  2. Step 2: Convert to fraction form
    186,879,766.80/280,317,025.80 = 84,643,640.40/x
  3. Step 3: Cross multiply
    186,879,766.80x = 280,317,025.80 × 84,643,640.40
  4. Step 4: Simplify right side
    186,879,766.80x = 23,727,053,529,812,724
  5. Step 5: Solve for x
    x = 23,727,053,529,812,724/186,879,766.80
  6. Step 6: Final answer
    x = 126,964,271.93

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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.