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Finding the Fourth Proportional to 127,274.40, 190,911.60 and 71,287.20

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Solution

The fourth proportional to 127,274.40, 190,911.60 and 71,287.20 is: 106,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,274.40 : 190,911.60 = 71,287.20 : x
  2. Step 2: Convert to fraction form
    127,274.40/190,911.60 = 71,287.20/x
  3. Step 3: Cross multiply
    127,274.40x = 190,911.60 × 71,287.20
  4. Step 4: Simplify right side
    127,274.40x = 13,609,553,411.52
  5. Step 5: Solve for x
    x = 13,609,553,411.52/127,274.40
  6. Step 6: Final answer
    x = 106,930.80

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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.