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Finding the Fourth Proportional to 127,229.80, 190,844.70 and 74,698.60

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Solution

The fourth proportional to 127,229.80, 190,844.70 and 74,698.60 is: 112,047.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,229.80 : 190,844.70 = 74,698.60 : x
  2. Step 2: Convert to fraction form
    127,229.80/190,844.70 = 74,698.60/x
  3. Step 3: Cross multiply
    127,229.80x = 190,844.70 × 74,698.60
  4. Step 4: Simplify right side
    127,229.80x = 14,255,831,907.42
  5. Step 5: Solve for x
    x = 14,255,831,907.42/127,229.80
  6. Step 6: Final answer
    x = 112,047.90

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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.