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Finding the Fourth Proportional to 213,661.03, 320,265.54 and 80,483.68

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Solution

The fourth proportional to 213,661.03, 320,265.54 and 80,483.68 is: 120,640.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,661.03 : 320,265.54 = 80,483.68 : x
  2. Step 2: Convert to fraction form
    213,661.03/320,265.54 = 80,483.68/x
  3. Step 3: Cross multiply
    213,661.03x = 320,265.54 × 80,483.68
  4. Step 4: Simplify right side
    213,661.03x = 25,776,149,236.39
  5. Step 5: Solve for x
    x = 25,776,149,236.39/213,661.03
  6. Step 6: Final answer
    x = 120,640.39

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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.