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Finding the Fourth Proportional to 190,858.60, 286,287.90 and 119,999.80

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Solution

The fourth proportional to 190,858.60, 286,287.90 and 119,999.80 is: 179,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,858.60 : 286,287.90 = 119,999.80 : x
  2. Step 2: Convert to fraction form
    190,858.60/286,287.90 = 119,999.80/x
  3. Step 3: Cross multiply
    190,858.60x = 286,287.90 × 119,999.80
  4. Step 4: Simplify right side
    190,858.60x = 34,354,490,742.42
  5. Step 5: Solve for x
    x = 34,354,490,742.42/190,858.60
  6. Step 6: Final answer
    x = 179,999.70

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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.