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Finding the Fourth Proportional to 68,893.12, 103,315.36 and 22,130.20

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Solution

The fourth proportional to 68,893.12, 103,315.36 and 22,130.20 is: 33,187.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,893.12 : 103,315.36 = 22,130.20 : x
  2. Step 2: Convert to fraction form
    68,893.12/103,315.36 = 22,130.20/x
  3. Step 3: Cross multiply
    68,893.12x = 103,315.36 × 22,130.20
  4. Step 4: Simplify right side
    68,893.12x = 2,286,389,579.87
  5. Step 5: Solve for x
    x = 2,286,389,579.87/68,893.12
  6. Step 6: Final answer
    x = 33,187.49

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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.