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Finding the Fourth Proportional to 53,921.30, 80,917.92 and 18,860.94

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Solution

The fourth proportional to 53,921.30, 80,917.92 and 18,860.94 is: 28,303.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,921.30 : 80,917.92 = 18,860.94 : x
  2. Step 2: Convert to fraction form
    53,921.30/80,917.92 = 18,860.94/x
  3. Step 3: Cross multiply
    53,921.30x = 80,917.92 × 18,860.94
  4. Step 4: Simplify right side
    53,921.30x = 1,526,188,034.04
  5. Step 5: Solve for x
    x = 1,526,188,034.04/53,921.30
  6. Step 6: Final answer
    x = 28,303.99

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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.