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Finding the Fourth Proportional to 218,806.48, 328,180.48 and 61,021.72

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Solution

The fourth proportional to 218,806.48, 328,180.48 and 61,021.72 is: 91,524.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,806.48 : 328,180.48 = 61,021.72 : x
  2. Step 2: Convert to fraction form
    218,806.48/328,180.48 = 61,021.72/x
  3. Step 3: Cross multiply
    218,806.48x = 328,180.48 × 61,021.72
  4. Step 4: Simplify right side
    218,806.48x = 20,026,137,360.03
  5. Step 5: Solve for x
    x = 20,026,137,360.03/218,806.48
  6. Step 6: Final answer
    x = 91,524.43

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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.