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Finding the Fourth Proportional to 57,782.20, 86,673.30 and 51,221.20

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Solution

The fourth proportional to 57,782.20, 86,673.30 and 51,221.20 is: 76,831.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,782.20 : 86,673.30 = 51,221.20 : x
  2. Step 2: Convert to fraction form
    57,782.20/86,673.30 = 51,221.20/x
  3. Step 3: Cross multiply
    57,782.20x = 86,673.30 × 51,221.20
  4. Step 4: Simplify right side
    57,782.20x = 4,439,510,433.96
  5. Step 5: Solve for x
    x = 4,439,510,433.96/57,782.20
  6. Step 6: Final answer
    x = 76,831.80

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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.