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Finding the Fourth Proportional to 209,521.44, 289,101.30 and 136,905.12

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Solution

The fourth proportional to 209,521.44, 289,101.30 and 136,905.12 is: 188,904.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,521.44 : 289,101.30 = 136,905.12 : x
  2. Step 2: Convert to fraction form
    209,521.44/289,101.30 = 136,905.12/x
  3. Step 3: Cross multiply
    209,521.44x = 289,101.30 × 136,905.12
  4. Step 4: Simplify right side
    209,521.44x = 39,579,448,168.66
  5. Step 5: Solve for x
    x = 39,579,448,168.66/209,521.44
  6. Step 6: Final answer
    x = 188,904.05

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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.