Home / 78,109.66-117,140.35-28,183.41

Finding the Fourth Proportional to 78,109.66, 117,140.35 and 28,183.41

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Solution

The fourth proportional to 78,109.66, 117,140.35 and 28,183.41 is: 42,266.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,109.66 : 117,140.35 = 28,183.41 : x
  2. Step 2: Convert to fraction form
    78,109.66/117,140.35 = 28,183.41/x
  3. Step 3: Cross multiply
    78,109.66x = 117,140.35 × 28,183.41
  4. Step 4: Simplify right side
    78,109.66x = 3,301,414,370.68
  5. Step 5: Solve for x
    x = 3,301,414,370.68/78,109.66
  6. Step 6: Final answer
    x = 42,266.40

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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.