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Finding the Fourth Proportional to 56,760.48, 85,140.72 and 19,324.44

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Solution

The fourth proportional to 56,760.48, 85,140.72 and 19,324.44 is: 28,986.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,760.48 : 85,140.72 = 19,324.44 : x
  2. Step 2: Convert to fraction form
    56,760.48/85,140.72 = 19,324.44/x
  3. Step 3: Cross multiply
    56,760.48x = 85,140.72 × 19,324.44
  4. Step 4: Simplify right side
    56,760.48x = 1,645,296,735.20
  5. Step 5: Solve for x
    x = 1,645,296,735.20/56,760.48
  6. Step 6: Final answer
    x = 28,986.66

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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.