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Finding the Fourth Proportional to 218,362.90, 327,717.15 and 85,306.90

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Solution

The fourth proportional to 218,362.90, 327,717.15 and 85,306.90 is: 128,027.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,362.90 : 327,717.15 = 85,306.90 : x
  2. Step 2: Convert to fraction form
    218,362.90/327,717.15 = 85,306.90/x
  3. Step 3: Cross multiply
    218,362.90x = 327,717.15 × 85,306.90
  4. Step 4: Simplify right side
    218,362.90x = 27,956,534,143.34
  5. Step 5: Solve for x
    x = 27,956,534,143.34/218,362.90
  6. Step 6: Final answer
    x = 128,027.86

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1.5x scale

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.