Home / 78,323.12-117,388.35-30,890.60

Finding the Fourth Proportional to 78,323.12, 117,388.35 and 30,890.60

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Solution

The fourth proportional to 78,323.12, 117,388.35 and 30,890.60 is: 46,297.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,323.12 : 117,388.35 = 30,890.60 : x
  2. Step 2: Convert to fraction form
    78,323.12/117,388.35 = 30,890.60/x
  3. Step 3: Cross multiply
    78,323.12x = 117,388.35 × 30,890.60
  4. Step 4: Simplify right side
    78,323.12x = 3,626,195,977.57
  5. Step 5: Solve for x
    x = 3,626,195,977.57/78,323.12
  6. Step 6: Final answer
    x = 46,297.90

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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.