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Finding the Fourth Proportional to 136,390.95, 188,212.11 and 75,125.22

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Solution

The fourth proportional to 136,390.95, 188,212.11 and 75,125.22 is: 103,668.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,390.95 : 188,212.11 = 75,125.22 : x
  2. Step 2: Convert to fraction form
    136,390.95/188,212.11 = 75,125.22/x
  3. Step 3: Cross multiply
    136,390.95x = 188,212.11 × 75,125.22
  4. Step 4: Simplify right side
    136,390.95x = 14,139,476,170.41
  5. Step 5: Solve for x
    x = 14,139,476,170.41/136,390.95
  6. Step 6: Final answer
    x = 103,668.73

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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.