Home / 213,572.21-320,200.16-129,312.56

Finding the Fourth Proportional to 213,572.21, 320,200.16 and 129,312.56

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Solution

The fourth proportional to 213,572.21, 320,200.16 and 129,312.56 is: 193,873.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,572.21 : 320,200.16 = 129,312.56 : x
  2. Step 2: Convert to fraction form
    213,572.21/320,200.16 = 129,312.56/x
  3. Step 3: Cross multiply
    213,572.21x = 320,200.16 × 129,312.56
  4. Step 4: Simplify right side
    213,572.21x = 41,405,902,555.95
  5. Step 5: Solve for x
    x = 41,405,902,555.95/213,572.21
  6. Step 6: Final answer
    x = 193,873.09

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1.5x scale

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.