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Finding the Fourth Proportional to 68,877.21, 103,355.73 and 28,892.64

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Solution

The fourth proportional to 68,877.21, 103,355.73 and 28,892.64 is: 43,355.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,877.21 : 103,355.73 = 28,892.64 : x
  2. Step 2: Convert to fraction form
    68,877.21/103,355.73 = 28,892.64/x
  3. Step 3: Cross multiply
    68,877.21x = 103,355.73 × 28,892.64
  4. Step 4: Simplify right side
    68,877.21x = 2,986,219,898.83
  5. Step 5: Solve for x
    x = 2,986,219,898.83/68,877.21
  6. Step 6: Final answer
    x = 43,355.70

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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.