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Finding the Fourth Proportional to 53,958.96, 80,945.46 and 20,235.96

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Solution

The fourth proportional to 53,958.96, 80,945.46 and 20,235.96 is: 30,356.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,958.96 : 80,945.46 = 20,235.96 : x
  2. Step 2: Convert to fraction form
    53,958.96/80,945.46 = 20,235.96/x
  3. Step 3: Cross multiply
    53,958.96x = 80,945.46 × 20,235.96
  4. Step 4: Simplify right side
    53,958.96x = 1,638,009,090.74
  5. Step 5: Solve for x
    x = 1,638,009,090.74/53,958.96
  6. Step 6: Final answer
    x = 30,356.57

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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.