Home / 135,415.26-186,871.76-78,033.50

Finding the Fourth Proportional to 135,415.26, 186,871.76 and 78,033.50

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Solution

The fourth proportional to 135,415.26, 186,871.76 and 78,033.50 is: 107,685.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,415.26 : 186,871.76 = 78,033.50 : x
  2. Step 2: Convert to fraction form
    135,415.26/186,871.76 = 78,033.50/x
  3. Step 3: Cross multiply
    135,415.26x = 186,871.76 × 78,033.50
  4. Step 4: Simplify right side
    135,415.26x = 14,582,257,483.96
  5. Step 5: Solve for x
    x = 14,582,257,483.96/135,415.26
  6. Step 6: Final answer
    x = 107,685.48

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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.