Home / 128,528.88-177,369.71-71,940.26

Finding the Fourth Proportional to 128,528.88, 177,369.71 and 71,940.26

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Solution

The fourth proportional to 128,528.88, 177,369.71 and 71,940.26 is: 99,277.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,528.88 : 177,369.71 = 71,940.26 : x
  2. Step 2: Convert to fraction form
    128,528.88/177,369.71 = 71,940.26/x
  3. Step 3: Cross multiply
    128,528.88x = 177,369.71 × 71,940.26
  4. Step 4: Simplify right side
    128,528.88x = 12,760,023,053.52
  5. Step 5: Solve for x
    x = 12,760,023,053.52/128,528.88
  6. Step 6: Final answer
    x = 99,277.48

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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.