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Finding the Fourth Proportional to 127,893.78, 176,362.70 and 84,858.20

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Solution

The fourth proportional to 127,893.78, 176,362.70 and 84,858.20 is: 117,017.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,893.78 : 176,362.70 = 84,858.20 : x
  2. Step 2: Convert to fraction form
    127,893.78/176,362.70 = 84,858.20/x
  3. Step 3: Cross multiply
    127,893.78x = 176,362.70 × 84,858.20
  4. Step 4: Simplify right side
    127,893.78x = 14,965,821,269.14
  5. Step 5: Solve for x
    x = 14,965,821,269.14/127,893.78
  6. Step 6: Final answer
    x = 117,017.58

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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.