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Finding the Fourth Proportional to 54,245.79, 81,368.96 and 19,185.48

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Solution

The fourth proportional to 54,245.79, 81,368.96 and 19,185.48 is: 28,778.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,245.79 : 81,368.96 = 19,185.48 : x
  2. Step 2: Convert to fraction form
    54,245.79/81,368.96 = 19,185.48/x
  3. Step 3: Cross multiply
    54,245.79x = 81,368.96 × 19,185.48
  4. Step 4: Simplify right side
    54,245.79x = 1,561,102,458.77
  5. Step 5: Solve for x
    x = 1,561,102,458.77/54,245.79
  6. Step 6: Final answer
    x = 28,778.32

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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.