Home / 135,943.26-187,559.37-78,561.67

Finding the Fourth Proportional to 135,943.26, 187,559.37 and 78,561.67

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Solution

The fourth proportional to 135,943.26, 187,559.37 and 78,561.67 is: 108,390.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,943.26 : 187,559.37 = 78,561.67 : x
  2. Step 2: Convert to fraction form
    135,943.26/187,559.37 = 78,561.67/x
  3. Step 3: Cross multiply
    135,943.26x = 187,559.37 × 78,561.67
  4. Step 4: Simplify right side
    135,943.26x = 14,734,977,331.35
  5. Step 5: Solve for x
    x = 14,734,977,331.35/135,943.26
  6. Step 6: Final answer
    x = 108,390.64

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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.