Home / 81,813.09-122,653.29-36,801.49

Finding the Fourth Proportional to 81,813.09, 122,653.29 and 36,801.49

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Solution

The fourth proportional to 81,813.09, 122,653.29 and 36,801.49 is: 55,172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,813.09 : 122,653.29 = 36,801.49 : x
  2. Step 2: Convert to fraction form
    81,813.09/122,653.29 = 36,801.49/x
  3. Step 3: Cross multiply
    81,813.09x = 122,653.29 × 36,801.49
  4. Step 4: Simplify right side
    81,813.09x = 4,513,823,679.74
  5. Step 5: Solve for x
    x = 4,513,823,679.74/81,813.09
  6. Step 6: Final answer
    x = 55,172.39

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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.