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Finding the Fourth Proportional to 100,936.90, 151,238.49 and 71,303.86

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Solution

The fourth proportional to 100,936.90, 151,238.49 and 71,303.86 is: 106,837.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,936.90 : 151,238.49 = 71,303.86 : x
  2. Step 2: Convert to fraction form
    100,936.90/151,238.49 = 71,303.86/x
  3. Step 3: Cross multiply
    100,936.90x = 151,238.49 × 71,303.86
  4. Step 4: Simplify right side
    100,936.90x = 10,783,888,117.57
  5. Step 5: Solve for x
    x = 10,783,888,117.57/100,936.90
  6. Step 6: Final answer
    x = 106,837.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.