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Finding the Fourth Proportional to 154,866.62, 213,690.03 and 91,217.09

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Solution

The fourth proportional to 154,866.62, 213,690.03 and 91,217.09 is: 125,864.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,866.62 : 213,690.03 = 91,217.09 : x
  2. Step 2: Convert to fraction form
    154,866.62/213,690.03 = 91,217.09/x
  3. Step 3: Cross multiply
    154,866.62x = 213,690.03 × 91,217.09
  4. Step 4: Simplify right side
    154,866.62x = 19,492,182,698.61
  5. Step 5: Solve for x
    x = 19,492,182,698.61/154,866.62
  6. Step 6: Final answer
    x = 125,864.33

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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.