Home / 135,081.80-186,436.04-78,525.96

Finding the Fourth Proportional to 135,081.80, 186,436.04 and 78,525.96

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Solution

The fourth proportional to 135,081.80, 186,436.04 and 78,525.96 is: 108,379.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,081.80 : 186,436.04 = 78,525.96 : x
  2. Step 2: Convert to fraction form
    135,081.80/186,436.04 = 78,525.96/x
  3. Step 3: Cross multiply
    135,081.80x = 186,436.04 × 78,525.96
  4. Step 4: Simplify right side
    135,081.80x = 14,640,069,019.60
  5. Step 5: Solve for x
    x = 14,640,069,019.60/135,081.80
  6. Step 6: Final answer
    x = 108,379.29

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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.