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Finding the Fourth Proportional to 127,979.56, 191,969.36 and 65,610.28

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Solution

The fourth proportional to 127,979.56, 191,969.36 and 65,610.28 is: 98,415.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,979.56 : 191,969.36 = 65,610.28 : x
  2. Step 2: Convert to fraction form
    127,979.56/191,969.36 = 65,610.28/x
  3. Step 3: Cross multiply
    127,979.56x = 191,969.36 × 65,610.28
  4. Step 4: Simplify right side
    127,979.56x = 12,595,163,461.02
  5. Step 5: Solve for x
    x = 12,595,163,461.02/127,979.56
  6. Step 6: Final answer
    x = 98,415.43

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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.