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Finding the Fourth Proportional to 127,938.80, 191,663.40 and 68,754.80

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Solution

The fourth proportional to 127,938.80, 191,663.40 and 68,754.80 is: 103,000.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,938.80 : 191,663.40 = 68,754.80 : x
  2. Step 2: Convert to fraction form
    127,938.80/191,663.40 = 68,754.80/x
  3. Step 3: Cross multiply
    127,938.80x = 191,663.40 × 68,754.80
  4. Step 4: Simplify right side
    127,938.80x = 13,177,778,734.32
  5. Step 5: Solve for x
    x = 13,177,778,734.32/127,938.80
  6. Step 6: Final answer
    x = 103,000.64

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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.