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Finding the Fourth Proportional to 68,688.88, 103,053 and 33,638.80

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Solution

The fourth proportional to 68,688.88, 103,053 and 33,638.80 is: 50,467.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,688.88 : 103,053 = 33,638.80 : x
  2. Step 2: Convert to fraction form
    68,688.88/103,053 = 33,638.80/x
  3. Step 3: Cross multiply
    68,688.88x = 103,053 × 33,638.80
  4. Step 4: Simplify right side
    68,688.88x = 3,466,579,256.40
  5. Step 5: Solve for x
    x = 3,466,579,256.40/68,688.88
  6. Step 6: Final answer
    x = 50,467.84

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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.