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Finding the Fourth Proportional to 218,821.01, 328,231.47 and 69,166.37

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Solution

The fourth proportional to 218,821.01, 328,231.47 and 69,166.37 is: 103,749.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,821.01 : 328,231.47 = 69,166.37 : x
  2. Step 2: Convert to fraction form
    218,821.01/328,231.47 = 69,166.37/x
  3. Step 3: Cross multiply
    218,821.01x = 328,231.47 × 69,166.37
  4. Step 4: Simplify right side
    218,821.01x = 22,702,580,120.24
  5. Step 5: Solve for x
    x = 22,702,580,120.24/218,821.01
  6. Step 6: Final answer
    x = 103,749.55

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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.