Home / 213,642.77-320,012.06-138,539.81

Finding the Fourth Proportional to 213,642.77, 320,012.06 and 138,539.81

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Solution

The fourth proportional to 213,642.77, 320,012.06 and 138,539.81 is: 207,516.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,642.77 : 320,012.06 = 138,539.81 : x
  2. Step 2: Convert to fraction form
    213,642.77/320,012.06 = 138,539.81/x
  3. Step 3: Cross multiply
    213,642.77x = 320,012.06 × 138,539.81
  4. Step 4: Simplify right side
    213,642.77x = 44,334,410,097.44
  5. Step 5: Solve for x
    x = 44,334,410,097.44/213,642.77
  6. Step 6: Final answer
    x = 207,516.55

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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.