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Finding the Fourth Proportional to 218,405.07, 327,648.96 and 85,276.91

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Solution

The fourth proportional to 218,405.07, 327,648.96 and 85,276.91 is: 127,931.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,405.07 : 327,648.96 = 85,276.91 : x
  2. Step 2: Convert to fraction form
    218,405.07/327,648.96 = 85,276.91/x
  3. Step 3: Cross multiply
    218,405.07x = 327,648.96 × 85,276.91
  4. Step 4: Simplify right side
    218,405.07x = 27,940,890,873.51
  5. Step 5: Solve for x
    x = 27,940,890,873.51/218,405.07
  6. Step 6: Final answer
    x = 127,931.51

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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.