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Finding the Fourth Proportional to 68,603.32, 102,903.78 and 18,682.60

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Solution

The fourth proportional to 68,603.32, 102,903.78 and 18,682.60 is: 28,023.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,603.32 : 102,903.78 = 18,682.60 : x
  2. Step 2: Convert to fraction form
    68,603.32/102,903.78 = 18,682.60/x
  3. Step 3: Cross multiply
    68,603.32x = 102,903.78 × 18,682.60
  4. Step 4: Simplify right side
    68,603.32x = 1,922,510,160.23
  5. Step 5: Solve for x
    x = 1,922,510,160.23/68,603.32
  6. Step 6: Final answer
    x = 28,023.57

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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.