Home / 188,640.26-260,191.65-128,105.72

Finding the Fourth Proportional to 188,640.26, 260,191.65 and 128,105.72

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Solution

The fourth proportional to 188,640.26, 260,191.65 and 128,105.72 is: 176,696.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,640.26 : 260,191.65 = 128,105.72 : x
  2. Step 2: Convert to fraction form
    188,640.26/260,191.65 = 128,105.72/x
  3. Step 3: Cross multiply
    188,640.26x = 260,191.65 × 128,105.72
  4. Step 4: Simplify right side
    188,640.26x = 33,332,039,792.11
  5. Step 5: Solve for x
    x = 33,332,039,792.11/188,640.26
  6. Step 6: Final answer
    x = 176,696.32

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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.