Home / 136,391.21-188,212.55-75,135.39

Finding the Fourth Proportional to 136,391.21, 188,212.55 and 75,135.39

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Solution

The fourth proportional to 136,391.21, 188,212.55 and 75,135.39 is: 103,682.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,391.21 : 188,212.55 = 75,135.39 : x
  2. Step 2: Convert to fraction form
    136,391.21/188,212.55 = 75,135.39/x
  3. Step 3: Cross multiply
    136,391.21x = 188,212.55 × 75,135.39
  4. Step 4: Simplify right side
    136,391.21x = 14,141,423,818.14
  5. Step 5: Solve for x
    x = 14,141,423,818.14/136,391.21
  6. Step 6: Final answer
    x = 103,682.81

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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.