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Finding the Fourth Proportional to 68,559.15, 94,605.75 and 39,879.39

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Solution

The fourth proportional to 68,559.15, 94,605.75 and 39,879.39 is: 55,030.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,559.15 : 94,605.75 = 39,879.39 : x
  2. Step 2: Convert to fraction form
    68,559.15/94,605.75 = 39,879.39/x
  3. Step 3: Cross multiply
    68,559.15x = 94,605.75 × 39,879.39
  4. Step 4: Simplify right side
    68,559.15x = 3,772,819,600.49
  5. Step 5: Solve for x
    x = 3,772,819,600.49/68,559.15
  6. Step 6: Final answer
    x = 55,030.14

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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.