Home / 103,619.40-155,429.12-28,758.36

Finding the Fourth Proportional to 103,619.40, 155,429.12 and 28,758.36

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Solution

The fourth proportional to 103,619.40, 155,429.12 and 28,758.36 is: 43,137.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.40 : 155,429.12 = 28,758.36 : x
  2. Step 2: Convert to fraction form
    103,619.40/155,429.12 = 28,758.36/x
  3. Step 3: Cross multiply
    103,619.40x = 155,429.12 × 28,758.36
  4. Step 4: Simplify right side
    103,619.40x = 4,469,886,587.44
  5. Step 5: Solve for x
    x = 4,469,886,587.44/103,619.40
  6. Step 6: Final answer
    x = 43,137.55

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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.