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Finding the Fourth Proportional to 68,408.55, 102,558.15 and 28,933.20

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Solution

The fourth proportional to 68,408.55, 102,558.15 and 28,933.20 is: 43,376.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,408.55 : 102,558.15 = 28,933.20 : x
  2. Step 2: Convert to fraction form
    68,408.55/102,558.15 = 28,933.20/x
  3. Step 3: Cross multiply
    68,408.55x = 102,558.15 × 28,933.20
  4. Step 4: Simplify right side
    68,408.55x = 2,967,335,465.58
  5. Step 5: Solve for x
    x = 2,967,335,465.58/68,408.55
  6. Step 6: Final answer
    x = 43,376.68

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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.