Home / 128,514.06-177,328.25-80,733.57

Finding the Fourth Proportional to 128,514.06, 177,328.25 and 80,733.57

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Solution

The fourth proportional to 128,514.06, 177,328.25 and 80,733.57 is: 111,399.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,514.06 : 177,328.25 = 80,733.57 : x
  2. Step 2: Convert to fraction form
    128,514.06/177,328.25 = 80,733.57/x
  3. Step 3: Cross multiply
    128,514.06x = 177,328.25 × 80,733.57
  4. Step 4: Simplify right side
    128,514.06x = 14,316,342,280.68
  5. Step 5: Solve for x
    x = 14,316,342,280.68/128,514.06
  6. Step 6: Final answer
    x = 111,399.04

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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.