Home / 121,739.85-167,926.44-78,649.46

Finding the Fourth Proportional to 121,739.85, 167,926.44 and 78,649.46

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Solution

The fourth proportional to 121,739.85, 167,926.44 and 78,649.46 is: 108,488.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,739.85 : 167,926.44 = 78,649.46 : x
  2. Step 2: Convert to fraction form
    121,739.85/167,926.44 = 78,649.46/x
  3. Step 3: Cross multiply
    121,739.85x = 167,926.44 × 78,649.46
  4. Step 4: Simplify right side
    121,739.85x = 13,207,322,986.09
  5. Step 5: Solve for x
    x = 13,207,322,986.09/121,739.85
  6. Step 6: Final answer
    x = 108,488.08

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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.