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Finding the Fourth Proportional to 127,874.06, 191,866.40 and 68,640.56

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Solution

The fourth proportional to 127,874.06, 191,866.40 and 68,640.56 is: 102,990.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,874.06 : 191,866.40 = 68,640.56 : x
  2. Step 2: Convert to fraction form
    127,874.06/191,866.40 = 68,640.56/x
  3. Step 3: Cross multiply
    127,874.06x = 191,866.40 × 68,640.56
  4. Step 4: Simplify right side
    127,874.06x = 13,169,817,141.18
  5. Step 5: Solve for x
    x = 13,169,817,141.18/127,874.06
  6. Step 6: Final answer
    x = 102,990.53

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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.