Home / 85,016.05-117,280.80-66,021.95

Finding the Fourth Proportional to 85,016.05, 117,280.80 and 66,021.95

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Solution

The fourth proportional to 85,016.05, 117,280.80 and 66,021.95 is: 91,078.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,016.05 : 117,280.80 = 66,021.95 : x
  2. Step 2: Convert to fraction form
    85,016.05/117,280.80 = 66,021.95/x
  3. Step 3: Cross multiply
    85,016.05x = 117,280.80 × 66,021.95
  4. Step 4: Simplify right side
    85,016.05x = 7,743,107,406.76
  5. Step 5: Solve for x
    x = 7,743,107,406.76/85,016.05
  6. Step 6: Final answer
    x = 91,078.19

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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.