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Finding the Fourth Proportional to 85,362.72, 128,042.40 and 38,582.88

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Solution

The fourth proportional to 85,362.72, 128,042.40 and 38,582.88 is: 57,873.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,362.72 : 128,042.40 = 38,582.88 : x
  2. Step 2: Convert to fraction form
    85,362.72/128,042.40 = 38,582.88/x
  3. Step 3: Cross multiply
    85,362.72x = 128,042.40 × 38,582.88
  4. Step 4: Simplify right side
    85,362.72x = 4,940,244,554.11
  5. Step 5: Solve for x
    x = 4,940,244,554.11/85,362.72
  6. Step 6: Final answer
    x = 57,873.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.