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Finding the Fourth Proportional to 127,539.77, 191,305.40 and 68,490.77

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Solution

The fourth proportional to 127,539.77, 191,305.40 and 68,490.77 is: 102,733.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,539.77 : 191,305.40 = 68,490.77 : x
  2. Step 2: Convert to fraction form
    127,539.77/191,305.40 = 68,490.77/x
  3. Step 3: Cross multiply
    127,539.77x = 191,305.40 × 68,490.77
  4. Step 4: Simplify right side
    127,539.77x = 13,102,652,852.18
  5. Step 5: Solve for x
    x = 13,102,652,852.18/127,539.77
  6. Step 6: Final answer
    x = 102,733.86

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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.