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Finding the Fourth Proportional to 218,969.48, 328,425.90 and 69,224.84

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Solution

The fourth proportional to 218,969.48, 328,425.90 and 69,224.84 is: 103,828.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,969.48 : 328,425.90 = 69,224.84 : x
  2. Step 2: Convert to fraction form
    218,969.48/328,425.90 = 69,224.84/x
  3. Step 3: Cross multiply
    218,969.48x = 328,425.90 × 69,224.84
  4. Step 4: Simplify right side
    218,969.48x = 22,735,230,379.36
  5. Step 5: Solve for x
    x = 22,735,230,379.36/218,969.48
  6. Step 6: Final answer
    x = 103,828.31

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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.