Home / 135,526.70-187,021.80-78,168.42

Finding the Fourth Proportional to 135,526.70, 187,021.80 and 78,168.42

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Solution

The fourth proportional to 135,526.70, 187,021.80 and 78,168.42 is: 107,869.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,526.70 : 187,021.80 = 78,168.42 : x
  2. Step 2: Convert to fraction form
    135,526.70/187,021.80 = 78,168.42/x
  3. Step 3: Cross multiply
    135,526.70x = 187,021.80 × 78,168.42
  4. Step 4: Simplify right side
    135,526.70x = 14,619,198,611.56
  5. Step 5: Solve for x
    x = 14,619,198,611.56/135,526.70
  6. Step 6: Final answer
    x = 107,869.51

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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.