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Finding the Fourth Proportional to 55,710.48, 83,512.44 and 20,640.72

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Solution

The fourth proportional to 55,710.48, 83,512.44 and 20,640.72 is: 30,941.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,710.48 : 83,512.44 = 20,640.72 : x
  2. Step 2: Convert to fraction form
    55,710.48/83,512.44 = 20,640.72/x
  3. Step 3: Cross multiply
    55,710.48x = 83,512.44 × 20,640.72
  4. Step 4: Simplify right side
    55,710.48x = 1,723,756,890.56
  5. Step 5: Solve for x
    x = 1,723,756,890.56/55,710.48
  6. Step 6: Final answer
    x = 30,941.34

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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.