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Finding the Fourth Proportional to 126,699.88, 174,850.50 and 81,987.88

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Solution

The fourth proportional to 126,699.88, 174,850.50 and 81,987.88 is: 113,146.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,699.88 : 174,850.50 = 81,987.88 : x
  2. Step 2: Convert to fraction form
    126,699.88/174,850.50 = 81,987.88/x
  3. Step 3: Cross multiply
    126,699.88x = 174,850.50 × 81,987.88
  4. Step 4: Simplify right side
    126,699.88x = 14,335,621,811.94
  5. Step 5: Solve for x
    x = 14,335,621,811.94/126,699.88
  6. Step 6: Final answer
    x = 113,146.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.