Home / 78,157.44-117,258.03-31,443.12

Finding the Fourth Proportional to 78,157.44, 117,258.03 and 31,443.12

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Solution

The fourth proportional to 78,157.44, 117,258.03 and 31,443.12 is: 47,173.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,157.44 : 117,258.03 = 31,443.12 : x
  2. Step 2: Convert to fraction form
    78,157.44/117,258.03 = 31,443.12/x
  3. Step 3: Cross multiply
    78,157.44x = 117,258.03 × 31,443.12
  4. Step 4: Simplify right side
    78,157.44x = 3,686,958,308.25
  5. Step 5: Solve for x
    x = 3,686,958,308.25/78,157.44
  6. Step 6: Final answer
    x = 47,173.48

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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.