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Finding the Fourth Proportional to 218,420.03, 327,668.51 and 90,335.94

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Solution

The fourth proportional to 218,420.03, 327,668.51 and 90,335.94 is: 135,519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,420.03 : 327,668.51 = 90,335.94 : x
  2. Step 2: Convert to fraction form
    218,420.03/327,668.51 = 90,335.94/x
  3. Step 3: Cross multiply
    218,420.03x = 327,668.51 × 90,335.94
  4. Step 4: Simplify right side
    218,420.03x = 29,600,243,085.09
  5. Step 5: Solve for x
    x = 29,600,243,085.09/218,420.03
  6. Step 6: Final answer
    x = 135,519.82

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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.