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Finding the Fourth Proportional to 54,477.20, 81,670.44 and 21,189.44

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Solution

The fourth proportional to 54,477.20, 81,670.44 and 21,189.44 is: 31,766.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,477.20 : 81,670.44 = 21,189.44 : x
  2. Step 2: Convert to fraction form
    54,477.20/81,670.44 = 21,189.44/x
  3. Step 3: Cross multiply
    54,477.20x = 81,670.44 × 21,189.44
  4. Step 4: Simplify right side
    54,477.20x = 1,730,550,888.15
  5. Step 5: Solve for x
    x = 1,730,550,888.15/54,477.20
  6. Step 6: Final answer
    x = 31,766.52

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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.