Home / 128,668.92-177,588.36-77,690.04

Finding the Fourth Proportional to 128,668.92, 177,588.36 and 77,690.04

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Solution

The fourth proportional to 128,668.92, 177,588.36 and 77,690.04 is: 107,227.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,668.92 : 177,588.36 = 77,690.04 : x
  2. Step 2: Convert to fraction form
    128,668.92/177,588.36 = 77,690.04/x
  3. Step 3: Cross multiply
    128,668.92x = 177,588.36 × 77,690.04
  4. Step 4: Simplify right side
    128,668.92x = 13,796,846,791.93
  5. Step 5: Solve for x
    x = 13,796,846,791.93/128,668.92
  6. Step 6: Final answer
    x = 107,227.50

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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.