Home / 78,083.03-117,171.21-71,730.65

Finding the Fourth Proportional to 78,083.03, 117,171.21 and 71,730.65

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Solution

The fourth proportional to 78,083.03, 117,171.21 and 71,730.65 is: 107,638.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,083.03 : 117,171.21 = 71,730.65 : x
  2. Step 2: Convert to fraction form
    78,083.03/117,171.21 = 71,730.65/x
  3. Step 3: Cross multiply
    78,083.03x = 117,171.21 × 71,730.65
  4. Step 4: Simplify right side
    78,083.03x = 8,404,767,048.25
  5. Step 5: Solve for x
    x = 8,404,767,048.25/78,083.03
  6. Step 6: Final answer
    x = 107,638.84

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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.