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Finding the Fourth Proportional to 121,672.78, 182,530.19 and 54,228.78

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Solution

The fourth proportional to 121,672.78, 182,530.19 and 54,228.78 is: 81,352.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,672.78 : 182,530.19 = 54,228.78 : x
  2. Step 2: Convert to fraction form
    121,672.78/182,530.19 = 54,228.78/x
  3. Step 3: Cross multiply
    121,672.78x = 182,530.19 × 54,228.78
  4. Step 4: Simplify right side
    121,672.78x = 9,898,389,652.44
  5. Step 5: Solve for x
    x = 9,898,389,652.44/121,672.78
  6. Step 6: Final answer
    x = 81,352.54

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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.