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Finding the Fourth Proportional to 68,851,877.88, 103,260,605.94 and 20,320,099.32

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Solution

The fourth proportional to 68,851,877.88, 103,260,605.94 and 20,320,099.32 is: 30,475,069.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,851,877.88 : 103,260,605.94 = 20,320,099.32 : x
  2. Step 2: Convert to fraction form
    68,851,877.88/103,260,605.94 = 20,320,099.32/x
  3. Step 3: Cross multiply
    68,851,877.88x = 103,260,605.94 × 20,320,099.32
  4. Step 4: Simplify right side
    68,851,877.88x = 2,098,265,768,544,182
  5. Step 5: Solve for x
    x = 2,098,265,768,544,182/68,851,877.88
  6. Step 6: Final answer
    x = 30,475,069.57

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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.