Home / 128,566.16-177,400.14-80,785.64

Finding the Fourth Proportional to 128,566.16, 177,400.14 and 80,785.64

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Solution

The fourth proportional to 128,566.16, 177,400.14 and 80,785.64 is: 111,470.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,566.16 : 177,400.14 = 80,785.64 : x
  2. Step 2: Convert to fraction form
    128,566.16/177,400.14 = 80,785.64/x
  3. Step 3: Cross multiply
    128,566.16x = 177,400.14 × 80,785.64
  4. Step 4: Simplify right side
    128,566.16x = 14,331,383,845.99
  5. Step 5: Solve for x
    x = 14,331,383,845.99/128,566.16
  6. Step 6: Final answer
    x = 111,470.89

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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.