Home / 135,914.31-187,550.78-78,557.35

Finding the Fourth Proportional to 135,914.31, 187,550.78 and 78,557.35

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Solution

The fourth proportional to 135,914.31, 187,550.78 and 78,557.35 is: 108,402.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,914.31 : 187,550.78 = 78,557.35 : x
  2. Step 2: Convert to fraction form
    135,914.31/187,550.78 = 78,557.35/x
  3. Step 3: Cross multiply
    135,914.31x = 187,550.78 × 78,557.35
  4. Step 4: Simplify right side
    135,914.31x = 14,733,491,405.57
  5. Step 5: Solve for x
    x = 14,733,491,405.57/135,914.31
  6. Step 6: Final answer
    x = 108,402.79

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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.