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Finding the Fourth Proportional to 218,353.41, 327,642.30 and 90,364.77

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Solution

The fourth proportional to 218,353.41, 327,642.30 and 90,364.77 is: 135,593.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,353.41 : 327,642.30 = 90,364.77 : x
  2. Step 2: Convert to fraction form
    218,353.41/327,642.30 = 90,364.77/x
  3. Step 3: Cross multiply
    218,353.41x = 327,642.30 × 90,364.77
  4. Step 4: Simplify right side
    218,353.41x = 29,607,321,081.77
  5. Step 5: Solve for x
    x = 29,607,321,081.77/218,353.41
  6. Step 6: Final answer
    x = 135,593.58

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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.