Home / 112,836.65-155,776.97-100,871.33

Finding the Fourth Proportional to 112,836.65, 155,776.97 and 100,871.33

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Solution

The fourth proportional to 112,836.65, 155,776.97 and 100,871.33 is: 139,258.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,836.65 : 155,776.97 = 100,871.33 : x
  2. Step 2: Convert to fraction form
    112,836.65/155,776.97 = 100,871.33/x
  3. Step 3: Cross multiply
    112,836.65x = 155,776.97 × 100,871.33
  4. Step 4: Simplify right side
    112,836.65x = 15,713,429,620.56
  5. Step 5: Solve for x
    x = 15,713,429,620.56/112,836.65
  6. Step 6: Final answer
    x = 139,258.21

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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.