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Finding the Fourth Proportional to 127,228.80, 190,843.20 and 74,084.70

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Solution

The fourth proportional to 127,228.80, 190,843.20 and 74,084.70 is: 111,127.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,228.80 : 190,843.20 = 74,084.70 : x
  2. Step 2: Convert to fraction form
    127,228.80/190,843.20 = 74,084.70/x
  3. Step 3: Cross multiply
    127,228.80x = 190,843.20 × 74,084.70
  4. Step 4: Simplify right side
    127,228.80x = 14,138,561,219.04
  5. Step 5: Solve for x
    x = 14,138,561,219.04/127,228.80
  6. Step 6: Final answer
    x = 111,127.05

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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.