Home / 100,228.26-138,315.06-54,907.89

Finding the Fourth Proportional to 100,228.26, 138,315.06 and 54,907.89

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Solution

The fourth proportional to 100,228.26, 138,315.06 and 54,907.89 is: 75,772.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,228.26 : 138,315.06 = 54,907.89 : x
  2. Step 2: Convert to fraction form
    100,228.26/138,315.06 = 54,907.89/x
  3. Step 3: Cross multiply
    100,228.26x = 138,315.06 × 54,907.89
  4. Step 4: Simplify right side
    100,228.26x = 7,594,587,581.14
  5. Step 5: Solve for x
    x = 7,594,587,581.14/100,228.26
  6. Step 6: Final answer
    x = 75,772.91

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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.