Home / 105,112.39-145,213.07-68,899.79

Finding the Fourth Proportional to 105,112.39, 145,213.07 and 68,899.79

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Solution

The fourth proportional to 105,112.39, 145,213.07 and 68,899.79 is: 95,185.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,112.39 : 145,213.07 = 68,899.79 : x
  2. Step 2: Convert to fraction form
    105,112.39/145,213.07 = 68,899.79/x
  3. Step 3: Cross multiply
    105,112.39x = 145,213.07 × 68,899.79
  4. Step 4: Simplify right side
    105,112.39x = 10,005,150,028.26
  5. Step 5: Solve for x
    x = 10,005,150,028.26/105,112.39
  6. Step 6: Final answer
    x = 95,185.26

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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.