Home / 100,270.28-138,415.66-67,571.86

Finding the Fourth Proportional to 100,270.28, 138,415.66 and 67,571.86

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Solution

The fourth proportional to 100,270.28, 138,415.66 and 67,571.86 is: 93,277.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,270.28 : 138,415.66 = 67,571.86 : x
  2. Step 2: Convert to fraction form
    100,270.28/138,415.66 = 67,571.86/x
  3. Step 3: Cross multiply
    100,270.28x = 138,415.66 × 67,571.86
  4. Step 4: Simplify right side
    100,270.28x = 9,353,003,599.33
  5. Step 5: Solve for x
    x = 9,353,003,599.33/100,270.28
  6. Step 6: Final answer
    x = 93,277.92

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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.