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Finding the Fourth Proportional to 191,090.95, 286,636.12 and 85,786.90

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Solution

The fourth proportional to 191,090.95, 286,636.12 and 85,786.90 is: 128,680.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,090.95 : 286,636.12 = 85,786.90 : x
  2. Step 2: Convert to fraction form
    191,090.95/286,636.12 = 85,786.90/x
  3. Step 3: Cross multiply
    191,090.95x = 286,636.12 × 85,786.90
  4. Step 4: Simplify right side
    191,090.95x = 24,589,623,231.77
  5. Step 5: Solve for x
    x = 24,589,623,231.77/191,090.95
  6. Step 6: Final answer
    x = 128,680.21

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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.