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Finding the Fourth Proportional to 54,359.39, 81,528.78 and 16,919.93

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Solution

The fourth proportional to 54,359.39, 81,528.78 and 16,919.93 is: 25,376.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,359.39 : 81,528.78 = 16,919.93 : x
  2. Step 2: Convert to fraction form
    54,359.39/81,528.78 = 16,919.93/x
  3. Step 3: Cross multiply
    54,359.39x = 81,528.78 × 16,919.93
  4. Step 4: Simplify right side
    54,359.39x = 1,379,461,250.59
  5. Step 5: Solve for x
    x = 1,379,461,250.59/54,359.39
  6. Step 6: Final answer
    x = 25,376.69

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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.