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Finding the Fourth Proportional to 163,898.78, 226,243.87 and 128,100.42

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Solution

The fourth proportional to 163,898.78, 226,243.87 and 128,100.42 is: 176,828.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,898.78 : 226,243.87 = 128,100.42 : x
  2. Step 2: Convert to fraction form
    163,898.78/226,243.87 = 128,100.42/x
  3. Step 3: Cross multiply
    163,898.78x = 226,243.87 × 128,100.42
  4. Step 4: Simplify right side
    163,898.78x = 28,981,934,449.17
  5. Step 5: Solve for x
    x = 28,981,934,449.17/163,898.78
  6. Step 6: Final answer
    x = 176,828.26

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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.