Home / 213,537.45-320,142.15-120,043.20

Finding the Fourth Proportional to 213,537.45, 320,142.15 and 120,043.20

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Solution

The fourth proportional to 213,537.45, 320,142.15 and 120,043.20 is: 179,972.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,537.45 : 320,142.15 = 120,043.20 : x
  2. Step 2: Convert to fraction form
    213,537.45/320,142.15 = 120,043.20/x
  3. Step 3: Cross multiply
    213,537.45x = 320,142.15 × 120,043.20
  4. Step 4: Simplify right side
    213,537.45x = 38,430,888,140.88
  5. Step 5: Solve for x
    x = 38,430,888,140.88/213,537.45
  6. Step 6: Final answer
    x = 179,972.59

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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.