Home / 111,759.24-154,101.78-81,491.16

Finding the Fourth Proportional to 111,759.24, 154,101.78 and 81,491.16

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Solution

The fourth proportional to 111,759.24, 154,101.78 and 81,491.16 is: 112,365.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,759.24 : 154,101.78 = 81,491.16 : x
  2. Step 2: Convert to fraction form
    111,759.24/154,101.78 = 81,491.16/x
  3. Step 3: Cross multiply
    111,759.24x = 154,101.78 × 81,491.16
  4. Step 4: Simplify right side
    111,759.24x = 12,557,932,810.26
  5. Step 5: Solve for x
    x = 12,557,932,810.26/111,759.24
  6. Step 6: Final answer
    x = 112,365.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.