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Finding the Fourth Proportional to 431,137,896.90, 646,706,845.35 and 124,440,015.30

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Solution

The fourth proportional to 431,137,896.90, 646,706,845.35 and 124,440,015.30 is: 186,660,022.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,137,896.90 : 646,706,845.35 = 124,440,015.30 : x
  2. Step 2: Convert to fraction form
    431,137,896.90/646,706,845.35 = 124,440,015.30/x
  3. Step 3: Cross multiply
    431,137,896.90x = 646,706,845.35 × 124,440,015.30
  4. Step 4: Simplify right side
    431,137,896.90x = 80,476,209,729,968,736
  5. Step 5: Solve for x
    x = 80,476,209,729,968,736/431,137,896.90
  6. Step 6: Final answer
    x = 186,660,022.95

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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.