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Finding the Fourth Proportional to 121,117.75, 166,969.27 and 85,196.27

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Solution

The fourth proportional to 121,117.75, 166,969.27 and 85,196.27 is: 117,449.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,117.75 : 166,969.27 = 85,196.27 : x
  2. Step 2: Convert to fraction form
    121,117.75/166,969.27 = 85,196.27/x
  3. Step 3: Cross multiply
    121,117.75x = 166,969.27 × 85,196.27
  4. Step 4: Simplify right side
    121,117.75x = 14,225,159,532.54
  5. Step 5: Solve for x
    x = 14,225,159,532.54/121,117.75
  6. Step 6: Final answer
    x = 117,449.01

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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.