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Finding the Fourth Proportional to 54,651.08, 81,978.30 and 21,369.80

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Solution

The fourth proportional to 54,651.08, 81,978.30 and 21,369.80 is: 32,055.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,651.08 : 81,978.30 = 21,369.80 : x
  2. Step 2: Convert to fraction form
    54,651.08/81,978.30 = 21,369.80/x
  3. Step 3: Cross multiply
    54,651.08x = 81,978.30 × 21,369.80
  4. Step 4: Simplify right side
    54,651.08x = 1,751,859,875.34
  5. Step 5: Solve for x
    x = 1,751,859,875.34/54,651.08
  6. Step 6: Final answer
    x = 32,055.36

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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.