Home / 103,619.78-155,429.70-28,758.77

Finding the Fourth Proportional to 103,619.78, 155,429.70 and 28,758.77

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Solution

The fourth proportional to 103,619.78, 155,429.70 and 28,758.77 is: 43,138.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.78 : 155,429.70 = 28,758.77 : x
  2. Step 2: Convert to fraction form
    103,619.78/155,429.70 = 28,758.77/x
  3. Step 3: Cross multiply
    103,619.78x = 155,429.70 × 28,758.77
  4. Step 4: Simplify right side
    103,619.78x = 4,469,966,993.47
  5. Step 5: Solve for x
    x = 4,469,966,993.47/103,619.78
  6. Step 6: Final answer
    x = 43,138.16

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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.