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Finding the Fourth Proportional to 218,418.60, 327,627.90 and 85,303.20

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Solution

The fourth proportional to 218,418.60, 327,627.90 and 85,303.20 is: 127,954.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,418.60 : 327,627.90 = 85,303.20 : x
  2. Step 2: Convert to fraction form
    218,418.60/327,627.90 = 85,303.20/x
  3. Step 3: Cross multiply
    218,418.60x = 327,627.90 × 85,303.20
  4. Step 4: Simplify right side
    218,418.60x = 27,947,708,279.28
  5. Step 5: Solve for x
    x = 27,947,708,279.28/218,418.60
  6. Step 6: Final answer
    x = 127,954.80

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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.