Home / 135,110.77-186,464.37-78,518.50

Finding the Fourth Proportional to 135,110.77, 186,464.37 and 78,518.50

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Solution

The fourth proportional to 135,110.77, 186,464.37 and 78,518.50 is: 108,362.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,110.77 : 186,464.37 = 78,518.50 : x
  2. Step 2: Convert to fraction form
    135,110.77/186,464.37 = 78,518.50/x
  3. Step 3: Cross multiply
    135,110.77x = 186,464.37 × 78,518.50
  4. Step 4: Simplify right side
    135,110.77x = 14,640,902,635.85
  5. Step 5: Solve for x
    x = 14,640,902,635.85/135,110.77
  6. Step 6: Final answer
    x = 108,362.22

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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.