Home / 78,428.31-117,351.73-46,855.54

Finding the Fourth Proportional to 78,428.31, 117,351.73 and 46,855.54

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Solution

The fourth proportional to 78,428.31, 117,351.73 and 46,855.54 is: 70,109.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,428.31 : 117,351.73 = 46,855.54 : x
  2. Step 2: Convert to fraction form
    78,428.31/117,351.73 = 46,855.54/x
  3. Step 3: Cross multiply
    78,428.31x = 117,351.73 × 46,855.54
  4. Step 4: Simplify right side
    78,428.31x = 5,498,578,679.08
  5. Step 5: Solve for x
    x = 5,498,578,679.08/78,428.31
  6. Step 6: Final answer
    x = 70,109.62

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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.