Home / 78,281.36-117,429.73-22,121.90

Finding the Fourth Proportional to 78,281.36, 117,429.73 and 22,121.90

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Solution

The fourth proportional to 78,281.36, 117,429.73 and 22,121.90 is: 33,185.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,281.36 : 117,429.73 = 22,121.90 : x
  2. Step 2: Convert to fraction form
    78,281.36/117,429.73 = 22,121.90/x
  3. Step 3: Cross multiply
    78,281.36x = 117,429.73 × 22,121.90
  4. Step 4: Simplify right side
    78,281.36x = 2,597,768,982.36
  5. Step 5: Solve for x
    x = 2,597,768,982.36/78,281.36
  6. Step 6: Final answer
    x = 33,185.03

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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.