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Finding the Fourth Proportional to 139,968,262.80, 209,952,394.20 and 127,203,181.20

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Solution

The fourth proportional to 139,968,262.80, 209,952,394.20 and 127,203,181.20 is: 190,804,771.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,262.80 : 209,952,394.20 = 127,203,181.20 : x
  2. Step 2: Convert to fraction form
    139,968,262.80/209,952,394.20 = 127,203,181.20/x
  3. Step 3: Cross multiply
    139,968,262.80x = 209,952,394.20 × 127,203,181.20
  4. Step 4: Simplify right side
    139,968,262.80x = 26,706,612,442,796,428
  5. Step 5: Solve for x
    x = 26,706,612,442,796,428/139,968,262.80
  6. Step 6: Final answer
    x = 190,804,771.80

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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.