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Finding the Fourth Proportional to 171,329.76, 236,509.20 and 128,898.72

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Solution

The fourth proportional to 171,329.76, 236,509.20 and 128,898.72 is: 177,936.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,329.76 : 236,509.20 = 128,898.72 : x
  2. Step 2: Convert to fraction form
    171,329.76/236,509.20 = 128,898.72/x
  3. Step 3: Cross multiply
    171,329.76x = 236,509.20 × 128,898.72
  4. Step 4: Simplify right side
    171,329.76x = 30,485,733,148.22
  5. Step 5: Solve for x
    x = 30,485,733,148.22/171,329.76
  6. Step 6: Final answer
    x = 177,936.01

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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.