Home / 135,741.83-187,332.57-78,383.57

Finding the Fourth Proportional to 135,741.83, 187,332.57 and 78,383.57

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Solution

The fourth proportional to 135,741.83, 187,332.57 and 78,383.57 is: 108,174.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,741.83 : 187,332.57 = 78,383.57 : x
  2. Step 2: Convert to fraction form
    135,741.83/187,332.57 = 78,383.57/x
  3. Step 3: Cross multiply
    135,741.83x = 187,332.57 × 78,383.57
  4. Step 4: Simplify right side
    135,741.83x = 14,683,794,677.21
  5. Step 5: Solve for x
    x = 14,683,794,677.21/135,741.83
  6. Step 6: Final answer
    x = 108,174.43

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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.