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Finding the Fourth Proportional to 139,968,007.20, 209,952,010.80 and 63,293,536.80

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Solution

The fourth proportional to 139,968,007.20, 209,952,010.80 and 63,293,536.80 is: 94,940,305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,007.20 : 209,952,010.80 = 63,293,536.80 : x
  2. Step 2: Convert to fraction form
    139,968,007.20/209,952,010.80 = 63,293,536.80/x
  3. Step 3: Cross multiply
    139,968,007.20x = 209,952,010.80 × 63,293,536.80
  4. Step 4: Simplify right side
    139,968,007.20x = 13,288,605,321,803,798
  5. Step 5: Solve for x
    x = 13,288,605,321,803,798/139,968,007.20
  6. Step 6: Final answer
    x = 94,940,305.20

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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.