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Finding the Fourth Proportional to 139,968,324.60, 209,952,486.90 and 49,080,103.80

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Solution

The fourth proportional to 139,968,324.60, 209,952,486.90 and 49,080,103.80 is: 73,620,155.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,324.60 : 209,952,486.90 = 49,080,103.80 : x
  2. Step 2: Convert to fraction form
    139,968,324.60/209,952,486.90 = 49,080,103.80/x
  3. Step 3: Cross multiply
    139,968,324.60x = 209,952,486.90 × 49,080,103.80
  4. Step 4: Simplify right side
    139,968,324.60x = 10,304,489,850,120,140
  5. Step 5: Solve for x
    x = 10,304,489,850,120,140/139,968,324.60
  6. Step 6: Final answer
    x = 73,620,155.70

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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.