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Finding the Fourth Proportional to 17,778,879.60, 26,668,319.40 and 12,039,316.80

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Solution

The fourth proportional to 17,778,879.60, 26,668,319.40 and 12,039,316.80 is: 18,058,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,778,879.60 : 26,668,319.40 = 12,039,316.80 : x
  2. Step 2: Convert to fraction form
    17,778,879.60/26,668,319.40 = 12,039,316.80/x
  3. Step 3: Cross multiply
    17,778,879.60x = 26,668,319.40 × 12,039,316.80
  4. Step 4: Simplify right side
    17,778,879.60x = 321,068,345,780,185.94
  5. Step 5: Solve for x
    x = 321,068,345,780,185.94/17,778,879.60
  6. Step 6: Final answer
    x = 18,058,975.20

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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.