Home / 135,704.15-187,268.11-78,341.52

Finding the Fourth Proportional to 135,704.15, 187,268.11 and 78,341.52

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Solution

The fourth proportional to 135,704.15, 187,268.11 and 78,341.52 is: 108,109.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,704.15 : 187,268.11 = 78,341.52 : x
  2. Step 2: Convert to fraction form
    135,704.15/187,268.11 = 78,341.52/x
  3. Step 3: Cross multiply
    135,704.15x = 187,268.11 × 78,341.52
  4. Step 4: Simplify right side
    135,704.15x = 14,670,868,891.33
  5. Step 5: Solve for x
    x = 14,670,868,891.33/135,704.15
  6. Step 6: Final answer
    x = 108,109.21

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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.