Home / 128,589.49-177,791.97-112,628.04

Finding the Fourth Proportional to 128,589.49, 177,791.97 and 112,628.04

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Solution

The fourth proportional to 128,589.49, 177,791.97 and 112,628.04 is: 155,723.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,589.49 : 177,791.97 = 112,628.04 : x
  2. Step 2: Convert to fraction form
    128,589.49/177,791.97 = 112,628.04/x
  3. Step 3: Cross multiply
    128,589.49x = 177,791.97 × 112,628.04
  4. Step 4: Simplify right side
    128,589.49x = 20,024,361,108.84
  5. Step 5: Solve for x
    x = 20,024,361,108.84/128,589.49
  6. Step 6: Final answer
    x = 155,723.16

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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.