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Finding the Fourth Proportional to 191,015.36, 286,424.16 and 85,743.68

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Solution

The fourth proportional to 191,015.36, 286,424.16 and 85,743.68 is: 128,571.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,015.36 : 286,424.16 = 85,743.68 : x
  2. Step 2: Convert to fraction form
    191,015.36/286,424.16 = 85,743.68/x
  3. Step 3: Cross multiply
    191,015.36x = 286,424.16 × 85,743.68
  4. Step 4: Simplify right side
    191,015.36x = 24,559,061,519.31
  5. Step 5: Solve for x
    x = 24,559,061,519.31/191,015.36
  6. Step 6: Final answer
    x = 128,571.13

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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.