Home / 81,391.14-122,116.07-43,400.45

Finding the Fourth Proportional to 81,391.14, 122,116.07 and 43,400.45

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Solution

The fourth proportional to 81,391.14, 122,116.07 and 43,400.45 is: 65,116.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.14 : 122,116.07 = 43,400.45 : x
  2. Step 2: Convert to fraction form
    81,391.14/122,116.07 = 43,400.45/x
  3. Step 3: Cross multiply
    81,391.14x = 122,116.07 × 43,400.45
  4. Step 4: Simplify right side
    81,391.14x = 5,299,892,804.02
  5. Step 5: Solve for x
    x = 5,299,892,804.02/81,391.14
  6. Step 6: Final answer
    x = 65,116.34

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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.