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Finding the Fourth Proportional to 128,181.16, 191,893.10 and 94,678.76

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Solution

The fourth proportional to 128,181.16, 191,893.10 and 94,678.76 is: 141,738.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,181.16 : 191,893.10 = 94,678.76 : x
  2. Step 2: Convert to fraction form
    128,181.16/191,893.10 = 94,678.76/x
  3. Step 3: Cross multiply
    128,181.16x = 191,893.10 × 94,678.76
  4. Step 4: Simplify right side
    128,181.16x = 18,168,200,760.56
  5. Step 5: Solve for x
    x = 18,168,200,760.56/128,181.16
  6. Step 6: Final answer
    x = 141,738.46

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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.