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Finding the Fourth Proportional to 127,310.40, 190,987.20 and 38,563.20

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Solution

The fourth proportional to 127,310.40, 190,987.20 and 38,563.20 is: 57,851.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,310.40 : 190,987.20 = 38,563.20 : x
  2. Step 2: Convert to fraction form
    127,310.40/190,987.20 = 38,563.20/x
  3. Step 3: Cross multiply
    127,310.40x = 190,987.20 × 38,563.20
  4. Step 4: Simplify right side
    127,310.40x = 7,365,077,591.04
  5. Step 5: Solve for x
    x = 7,365,077,591.04/127,310.40
  6. Step 6: Final answer
    x = 57,851.34

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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.