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Finding the Fourth Proportional to 149,016.40, 205,627.08 and 85,356.88

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Solution

The fourth proportional to 149,016.40, 205,627.08 and 85,356.88 is: 117,783.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,016.40 : 205,627.08 = 85,356.88 : x
  2. Step 2: Convert to fraction form
    149,016.40/205,627.08 = 85,356.88/x
  3. Step 3: Cross multiply
    149,016.40x = 205,627.08 × 85,356.88
  4. Step 4: Simplify right side
    149,016.40x = 17,551,685,992.31
  5. Step 5: Solve for x
    x = 17,551,685,992.31/149,016.40
  6. Step 6: Final answer
    x = 117,783.59

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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.