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Finding the Fourth Proportional to 55,276.62, 82,858.41 and 21,987.42

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Solution

The fourth proportional to 55,276.62, 82,858.41 and 21,987.42 is: 32,958.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,276.62 : 82,858.41 = 21,987.42 : x
  2. Step 2: Convert to fraction form
    55,276.62/82,858.41 = 21,987.42/x
  3. Step 3: Cross multiply
    55,276.62x = 82,858.41 × 21,987.42
  4. Step 4: Simplify right side
    55,276.62x = 1,821,842,661.20
  5. Step 5: Solve for x
    x = 1,821,842,661.20/55,276.62
  6. Step 6: Final answer
    x = 32,958.65

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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.