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Finding the Fourth Proportional to 218,405.70, 327,592.74 and 68,688.81

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Solution

The fourth proportional to 218,405.70, 327,592.74 and 68,688.81 is: 103,028.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,405.70 : 327,592.74 = 68,688.81 : x
  2. Step 2: Convert to fraction form
    218,405.70/327,592.74 = 68,688.81/x
  3. Step 3: Cross multiply
    218,405.70x = 327,592.74 × 68,688.81
  4. Step 4: Simplify right side
    218,405.70x = 22,501,955,475.24
  5. Step 5: Solve for x
    x = 22,501,955,475.24/218,405.70
  6. Step 6: Final answer
    x = 103,028.25

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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.