Home / 135,540.88-187,041.39-78,182.57

Finding the Fourth Proportional to 135,540.88, 187,041.39 and 78,182.57

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Solution

The fourth proportional to 135,540.88, 187,041.39 and 78,182.57 is: 107,889.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,540.88 : 187,041.39 = 78,182.57 : x
  2. Step 2: Convert to fraction form
    135,540.88/187,041.39 = 78,182.57/x
  3. Step 3: Cross multiply
    135,540.88x = 187,041.39 × 78,182.57
  4. Step 4: Simplify right side
    135,540.88x = 14,623,376,566.57
  5. Step 5: Solve for x
    x = 14,623,376,566.57/135,540.88
  6. Step 6: Final answer
    x = 107,889.05

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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.