Home / 190,857.96-286,243.20-85,707

Finding the Fourth Proportional to 190,857.96, 286,243.20 and 85,707

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Solution

The fourth proportional to 190,857.96, 286,243.20 and 85,707 is: 128,540.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,857.96 : 286,243.20 = 85,707 : x
  2. Step 2: Convert to fraction form
    190,857.96/286,243.20 = 85,707/x
  3. Step 3: Cross multiply
    190,857.96x = 286,243.20 × 85,707
  4. Step 4: Simplify right side
    190,857.96x = 24,533,045,942.40
  5. Step 5: Solve for x
    x = 24,533,045,942.40/190,857.96
  6. Step 6: Final answer
    x = 128,540.86

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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.