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Finding the Fourth Proportional to 68,695.89, 102,891.60 and 52,783.80

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Solution

The fourth proportional to 68,695.89, 102,891.60 and 52,783.80 is: 79,058.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,695.89 : 102,891.60 = 52,783.80 : x
  2. Step 2: Convert to fraction form
    68,695.89/102,891.60 = 52,783.80/x
  3. Step 3: Cross multiply
    68,695.89x = 102,891.60 × 52,783.80
  4. Step 4: Simplify right side
    68,695.89x = 5,431,009,636.08
  5. Step 5: Solve for x
    x = 5,431,009,636.08/68,695.89
  6. Step 6: Final answer
    x = 79,058.73

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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.