Home / 78,455.58-117,683.37-25,858.23

Finding the Fourth Proportional to 78,455.58, 117,683.37 and 25,858.23

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Solution

The fourth proportional to 78,455.58, 117,683.37 and 25,858.23 is: 38,787.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,455.58 : 117,683.37 = 25,858.23 : x
  2. Step 2: Convert to fraction form
    78,455.58/117,683.37 = 25,858.23/x
  3. Step 3: Cross multiply
    78,455.58x = 117,683.37 × 25,858.23
  4. Step 4: Simplify right side
    78,455.58x = 3,043,082,930.93
  5. Step 5: Solve for x
    x = 3,043,082,930.93/78,455.58
  6. Step 6: Final answer
    x = 38,787.34

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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.