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Finding the Fourth Proportional to 127,959.80, 191,939.70 and 98,435.30

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Solution

The fourth proportional to 127,959.80, 191,939.70 and 98,435.30 is: 147,652.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,959.80 : 191,939.70 = 98,435.30 : x
  2. Step 2: Convert to fraction form
    127,959.80/191,939.70 = 98,435.30/x
  3. Step 3: Cross multiply
    127,959.80x = 191,939.70 × 98,435.30
  4. Step 4: Simplify right side
    127,959.80x = 18,893,641,951.41
  5. Step 5: Solve for x
    x = 18,893,641,951.41/127,959.80
  6. Step 6: Final answer
    x = 147,652.95

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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.