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Finding the Fourth Proportional to 127,943.20, 178,887.20 and 127,943.20

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Solution

The fourth proportional to 127,943.20, 178,887.20 and 127,943.20 is: 178,887.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,943.20 : 178,887.20 = 127,943.20 : x
  2. Step 2: Convert to fraction form
    127,943.20/178,887.20 = 127,943.20/x
  3. Step 3: Cross multiply
    127,943.20x = 178,887.20 × 127,943.20
  4. Step 4: Simplify right side
    127,943.20x = 22,887,400,807.04
  5. Step 5: Solve for x
    x = 22,887,400,807.04/127,943.20
  6. Step 6: Final answer
    x = 178,887.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.