Home / 103,986.82-143,371.62-86,783.86

Finding the Fourth Proportional to 103,986.82, 143,371.62 and 86,783.86

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Solution

The fourth proportional to 103,986.82, 143,371.62 and 86,783.86 is: 119,653.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,986.82 : 143,371.62 = 86,783.86 : x
  2. Step 2: Convert to fraction form
    103,986.82/143,371.62 = 86,783.86/x
  3. Step 3: Cross multiply
    103,986.82x = 143,371.62 × 86,783.86
  4. Step 4: Simplify right side
    103,986.82x = 12,442,342,598.05
  5. Step 5: Solve for x
    x = 12,442,342,598.05/103,986.82
  6. Step 6: Final answer
    x = 119,653.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.