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Finding the Fourth Proportional to 127,128.88, 190,619.48 and 48,200.05

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Solution

The fourth proportional to 127,128.88, 190,619.48 and 48,200.05 is: 72,272.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,128.88 : 190,619.48 = 48,200.05 : x
  2. Step 2: Convert to fraction form
    127,128.88/190,619.48 = 48,200.05/x
  3. Step 3: Cross multiply
    127,128.88x = 190,619.48 × 48,200.05
  4. Step 4: Simplify right side
    127,128.88x = 9,187,867,272.88
  5. Step 5: Solve for x
    x = 9,187,867,272.88/127,128.88
  6. Step 6: Final answer
    x = 72,272.07

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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.