Home / 135,514.96-187,104-103,628.32

Finding the Fourth Proportional to 135,514.96, 187,104 and 103,628.32

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Solution

The fourth proportional to 135,514.96, 187,104 and 103,628.32 is: 143,078.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,514.96 : 187,104 = 103,628.32 : x
  2. Step 2: Convert to fraction form
    135,514.96/187,104 = 103,628.32/x
  3. Step 3: Cross multiply
    135,514.96x = 187,104 × 103,628.32
  4. Step 4: Simplify right side
    135,514.96x = 19,389,273,185.28
  5. Step 5: Solve for x
    x = 19,389,273,185.28/135,514.96
  6. Step 6: Final answer
    x = 143,078.47

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1.5x scale

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.