Home / 135,615.40-187,150.96-78,266.64

Finding the Fourth Proportional to 135,615.40, 187,150.96 and 78,266.64

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Solution

The fourth proportional to 135,615.40, 187,150.96 and 78,266.64 is: 108,008.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,615.40 : 187,150.96 = 78,266.64 : x
  2. Step 2: Convert to fraction form
    135,615.40/187,150.96 = 78,266.64/x
  3. Step 3: Cross multiply
    135,615.40x = 187,150.96 × 78,266.64
  4. Step 4: Simplify right side
    135,615.40x = 14,647,677,611.62
  5. Step 5: Solve for x
    x = 14,647,677,611.62/135,615.40
  6. Step 6: Final answer
    x = 108,008.96

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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.