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Finding the Fourth Proportional to 218,999.92, 328,558.27 and 69,243.02

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Solution

The fourth proportional to 218,999.92, 328,558.27 and 69,243.02 is: 103,882.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,999.92 : 328,558.27 = 69,243.02 : x
  2. Step 2: Convert to fraction form
    218,999.92/328,558.27 = 69,243.02/x
  3. Step 3: Cross multiply
    218,999.92x = 328,558.27 × 69,243.02
  4. Step 4: Simplify right side
    218,999.92x = 22,750,366,860.78
  5. Step 5: Solve for x
    x = 22,750,366,860.78/218,999.92
  6. Step 6: Final answer
    x = 103,882.99

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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.