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Finding the Fourth Proportional to 68,564.72, 94,640.52 and 39,892.88

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Solution

The fourth proportional to 68,564.72, 94,640.52 and 39,892.88 is: 55,064.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,564.72 : 94,640.52 = 39,892.88 : x
  2. Step 2: Convert to fraction form
    68,564.72/94,640.52 = 39,892.88/x
  3. Step 3: Cross multiply
    68,564.72x = 94,640.52 × 39,892.88
  4. Step 4: Simplify right side
    68,564.72x = 3,775,482,907.50
  5. Step 5: Solve for x
    x = 3,775,482,907.50/68,564.72
  6. Step 6: Final answer
    x = 55,064.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.