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Finding the Fourth Proportional to 68,600.76, 102,916.26 and 20,567.45

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Solution

The fourth proportional to 68,600.76, 102,916.26 and 20,567.45 is: 30,855.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,600.76 : 102,916.26 = 20,567.45 : x
  2. Step 2: Convert to fraction form
    68,600.76/102,916.26 = 20,567.45/x
  3. Step 3: Cross multiply
    68,600.76x = 102,916.26 × 20,567.45
  4. Step 4: Simplify right side
    68,600.76x = 2,116,725,260.10
  5. Step 5: Solve for x
    x = 2,116,725,260.10/68,600.76
  6. Step 6: Final answer
    x = 30,855.71

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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.