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Finding the Fourth Proportional to 53,181.69, 79,776.99 and 13,739.55

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Solution

The fourth proportional to 53,181.69, 79,776.99 and 13,739.55 is: 20,610.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,181.69 : 79,776.99 = 13,739.55 : x
  2. Step 2: Convert to fraction form
    53,181.69/79,776.99 = 13,739.55/x
  3. Step 3: Cross multiply
    53,181.69x = 79,776.99 × 13,739.55
  4. Step 4: Simplify right side
    53,181.69x = 1,096,099,942.95
  5. Step 5: Solve for x
    x = 1,096,099,942.95/53,181.69
  6. Step 6: Final answer
    x = 20,610.48

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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.