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Finding the Fourth Proportional to 209,856.60, 314,857.80 and 91,612.80

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Solution

The fourth proportional to 209,856.60, 314,857.80 and 91,612.80 is: 137,451.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,856.60 : 314,857.80 = 91,612.80 : x
  2. Step 2: Convert to fraction form
    209,856.60/314,857.80 = 91,612.80/x
  3. Step 3: Cross multiply
    209,856.60x = 314,857.80 × 91,612.80
  4. Step 4: Simplify right side
    209,856.60x = 28,845,004,659.84
  5. Step 5: Solve for x
    x = 28,845,004,659.84/209,856.60
  6. Step 6: Final answer
    x = 137,451.02

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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.