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Finding the Fourth Proportional to 154,863.45, 213,727.77 and 86,898.78

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Solution

The fourth proportional to 154,863.45, 213,727.77 and 86,898.78 is: 119,929.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,863.45 : 213,727.77 = 86,898.78 : x
  2. Step 2: Convert to fraction form
    154,863.45/213,727.77 = 86,898.78/x
  3. Step 3: Cross multiply
    154,863.45x = 213,727.77 × 86,898.78
  4. Step 4: Simplify right side
    154,863.45x = 18,572,682,465.12
  5. Step 5: Solve for x
    x = 18,572,682,465.12/154,863.45
  6. Step 6: Final answer
    x = 119,929.41

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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.