Home / 81,307.09-122,012.67-43,893.21

Finding the Fourth Proportional to 81,307.09, 122,012.67 and 43,893.21

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Solution

The fourth proportional to 81,307.09, 122,012.67 and 43,893.21 is: 65,867.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,307.09 : 122,012.67 = 43,893.21 : x
  2. Step 2: Convert to fraction form
    81,307.09/122,012.67 = 43,893.21/x
  3. Step 3: Cross multiply
    81,307.09x = 122,012.67 × 43,893.21
  4. Step 4: Simplify right side
    81,307.09x = 5,355,527,746.97
  5. Step 5: Solve for x
    x = 5,355,527,746.97/81,307.09
  6. Step 6: Final answer
    x = 65,867.91

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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.