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Finding the Fourth Proportional to 148,115.68, 204,399.30 and 81,047.68

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Solution

The fourth proportional to 148,115.68, 204,399.30 and 81,047.68 is: 111,845.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,115.68 : 204,399.30 = 81,047.68 : x
  2. Step 2: Convert to fraction form
    148,115.68/204,399.30 = 81,047.68/x
  3. Step 3: Cross multiply
    148,115.68x = 204,399.30 × 81,047.68
  4. Step 4: Simplify right side
    148,115.68x = 16,566,089,058.62
  5. Step 5: Solve for x
    x = 16,566,089,058.62/148,115.68
  6. Step 6: Final answer
    x = 111,845.61

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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.