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Finding the Fourth Proportional to 54,603.80, 81,909.42 and 18,565.58

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Solution

The fourth proportional to 54,603.80, 81,909.42 and 18,565.58 is: 27,849.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,603.80 : 81,909.42 = 18,565.58 : x
  2. Step 2: Convert to fraction form
    54,603.80/81,909.42 = 18,565.58/x
  3. Step 3: Cross multiply
    54,603.80x = 81,909.42 × 18,565.58
  4. Step 4: Simplify right side
    54,603.80x = 1,520,695,480.22
  5. Step 5: Solve for x
    x = 1,520,695,480.22/54,603.80
  6. Step 6: Final answer
    x = 27,849.63

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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.