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Finding the Fourth Proportional to 127,199.70, 190,821.15 and 68,019.30

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Solution

The fourth proportional to 127,199.70, 190,821.15 and 68,019.30 is: 102,040.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,199.70 : 190,821.15 = 68,019.30 : x
  2. Step 2: Convert to fraction form
    127,199.70/190,821.15 = 68,019.30/x
  3. Step 3: Cross multiply
    127,199.70x = 190,821.15 × 68,019.30
  4. Step 4: Simplify right side
    127,199.70x = 12,979,521,048.20
  5. Step 5: Solve for x
    x = 12,979,521,048.20/127,199.70
  6. Step 6: Final answer
    x = 102,040.50

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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.