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Finding the Fourth Proportional to 54,451.77, 81,689.28 and 18,914.19

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Solution

The fourth proportional to 54,451.77, 81,689.28 and 18,914.19 is: 28,375.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,451.77 : 81,689.28 = 18,914.19 : x
  2. Step 2: Convert to fraction form
    54,451.77/81,689.28 = 18,914.19/x
  3. Step 3: Cross multiply
    54,451.77x = 81,689.28 × 18,914.19
  4. Step 4: Simplify right side
    54,451.77x = 1,545,086,562.88
  5. Step 5: Solve for x
    x = 1,545,086,562.88/54,451.77
  6. Step 6: Final answer
    x = 28,375.32

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1.5x scale

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.