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Finding the Fourth Proportional to 139,968,009.20, 209,952,013.80 and 136,188,873.20

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Solution

The fourth proportional to 139,968,009.20, 209,952,013.80 and 136,188,873.20 is: 204,283,309.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,009.20 : 209,952,013.80 = 136,188,873.20 : x
  2. Step 2: Convert to fraction form
    139,968,009.20/209,952,013.80 = 136,188,873.20/x
  3. Step 3: Cross multiply
    139,968,009.20x = 209,952,013.80 × 136,188,873.20
  4. Step 4: Simplify right side
    139,968,009.20x = 28,593,128,185,492,848
  5. Step 5: Solve for x
    x = 28,593,128,185,492,848/139,968,009.20
  6. Step 6: Final answer
    x = 204,283,309.80

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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.