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Finding the Fourth Proportional to 128,896.10, 177,897.99 and 75,181.11

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Solution

The fourth proportional to 128,896.10, 177,897.99 and 75,181.11 is: 103,762.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896.10 : 177,897.99 = 75,181.11 : x
  2. Step 2: Convert to fraction form
    128,896.10/177,897.99 = 75,181.11/x
  3. Step 3: Cross multiply
    128,896.10x = 177,897.99 × 75,181.11
  4. Step 4: Simplify right side
    128,896.10x = 13,374,568,354.97
  5. Step 5: Solve for x
    x = 13,374,568,354.97/128,896.10
  6. Step 6: Final answer
    x = 103,762.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.