Home / 259,081.22-388,635.76-81,602.12

Finding the Fourth Proportional to 259,081.22, 388,635.76 and 81,602.12

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Solution

The fourth proportional to 259,081.22, 388,635.76 and 81,602.12 is: 122,407.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,081.22 : 388,635.76 = 81,602.12 : x
  2. Step 2: Convert to fraction form
    259,081.22/388,635.76 = 81,602.12/x
  3. Step 3: Cross multiply
    259,081.22x = 388,635.76 × 81,602.12
  4. Step 4: Simplify right side
    259,081.22x = 31,713,501,923.81
  5. Step 5: Solve for x
    x = 31,713,501,923.81/259,081.22
  6. Step 6: Final answer
    x = 122,407.57

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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.