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Finding the Fourth Proportional to 196,891.32, 271,615.44 and 128,878.32

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Solution

The fourth proportional to 196,891.32, 271,615.44 and 128,878.32 is: 177,790.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,891.32 : 271,615.44 = 128,878.32 : x
  2. Step 2: Convert to fraction form
    196,891.32/271,615.44 = 128,878.32/x
  3. Step 3: Cross multiply
    196,891.32x = 271,615.44 × 128,878.32
  4. Step 4: Simplify right side
    196,891.32x = 35,005,341,593.26
  5. Step 5: Solve for x
    x = 35,005,341,593.26/196,891.32
  6. Step 6: Final answer
    x = 177,790.17

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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.