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Finding the Fourth Proportional to 213,126,078.80, 298,678,841.20 and 213,126,078.80

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Solution

The fourth proportional to 213,126,078.80, 298,678,841.20 and 213,126,078.80 is: 298,678,841.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,126,078.80 : 298,678,841.20 = 213,126,078.80 : x
  2. Step 2: Convert to fraction form
    213,126,078.80/298,678,841.20 = 213,126,078.80/x
  3. Step 3: Cross multiply
    213,126,078.80x = 298,678,841.20 × 213,126,078.80
  4. Step 4: Simplify right side
    213,126,078.80x = 63,656,250,245,483,888
  5. Step 5: Solve for x
    x = 63,656,250,245,483,888/213,126,078.80
  6. Step 6: Final answer
    x = 298,678,841.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.