Home / 81,535.49-122,315.39-28,940.57

Finding the Fourth Proportional to 81,535.49, 122,315.39 and 28,940.57

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Solution

The fourth proportional to 81,535.49, 122,315.39 and 28,940.57 is: 43,415.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,535.49 : 122,315.39 = 28,940.57 : x
  2. Step 2: Convert to fraction form
    81,535.49/122,315.39 = 28,940.57/x
  3. Step 3: Cross multiply
    81,535.49x = 122,315.39 × 28,940.57
  4. Step 4: Simplify right side
    81,535.49x = 3,539,877,106.37
  5. Step 5: Solve for x
    x = 3,539,877,106.37/81,535.49
  6. Step 6: Final answer
    x = 43,415.17

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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.