Home / 78,435.18-117,556.38-36,258.21

Finding the Fourth Proportional to 78,435.18, 117,556.38 and 36,258.21

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Solution

The fourth proportional to 78,435.18, 117,556.38 and 36,258.21 is: 54,342.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,435.18 : 117,556.38 = 36,258.21 : x
  2. Step 2: Convert to fraction form
    78,435.18/117,556.38 = 36,258.21/x
  3. Step 3: Cross multiply
    78,435.18x = 117,556.38 × 36,258.21
  4. Step 4: Simplify right side
    78,435.18x = 4,262,383,912.88
  5. Step 5: Solve for x
    x = 4,262,383,912.88/78,435.18
  6. Step 6: Final answer
    x = 54,342.76

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1.5x scale

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.