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Finding the Fourth Proportional to 68,318.21, 102,452.72 and 28,878.39

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Solution

The fourth proportional to 68,318.21, 102,452.72 and 28,878.39 is: 43,307.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,318.21 : 102,452.72 = 28,878.39 : x
  2. Step 2: Convert to fraction form
    68,318.21/102,452.72 = 28,878.39/x
  3. Step 3: Cross multiply
    68,318.21x = 102,452.72 × 28,878.39
  4. Step 4: Simplify right side
    68,318.21x = 2,958,669,460.33
  5. Step 5: Solve for x
    x = 2,958,669,460.33/68,318.21
  6. Step 6: Final answer
    x = 43,307.18

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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.