Home / 135,564.40-187,078.90-75,138.94

Finding the Fourth Proportional to 135,564.40, 187,078.90 and 75,138.94

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Solution

The fourth proportional to 135,564.40, 187,078.90 and 75,138.94 is: 103,691.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,564.40 : 187,078.90 = 75,138.94 : x
  2. Step 2: Convert to fraction form
    135,564.40/187,078.90 = 75,138.94/x
  3. Step 3: Cross multiply
    135,564.40x = 187,078.90 × 75,138.94
  4. Step 4: Simplify right side
    135,564.40x = 14,056,910,242.37
  5. Step 5: Solve for x
    x = 14,056,910,242.37/135,564.40
  6. Step 6: Final answer
    x = 103,691.75

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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.