Home / 135,991.10-187,613.96-78,619.86

Finding the Fourth Proportional to 135,991.10, 187,613.96 and 78,619.86

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Solution

The fourth proportional to 135,991.10, 187,613.96 and 78,619.86 is: 108,464.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,991.10 : 187,613.96 = 78,619.86 : x
  2. Step 2: Convert to fraction form
    135,991.10/187,613.96 = 78,619.86/x
  3. Step 3: Cross multiply
    135,991.10x = 187,613.96 × 78,619.86
  4. Step 4: Simplify right side
    135,991.10x = 14,750,182,876.15
  5. Step 5: Solve for x
    x = 14,750,182,876.15/135,991.10
  6. Step 6: Final answer
    x = 108,464.33

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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.