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Finding the Fourth Proportional to 158,388.21, 218,400.52 and 100,936.46

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Solution

The fourth proportional to 158,388.21, 218,400.52 and 100,936.46 is: 139,180.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,388.21 : 218,400.52 = 100,936.46 : x
  2. Step 2: Convert to fraction form
    158,388.21/218,400.52 = 100,936.46/x
  3. Step 3: Cross multiply
    158,388.21x = 218,400.52 × 100,936.46
  4. Step 4: Simplify right side
    158,388.21x = 22,044,575,350.96
  5. Step 5: Solve for x
    x = 22,044,575,350.96/158,388.21
  6. Step 6: Final answer
    x = 139,180.66

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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.