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Finding the Fourth Proportional to 218,805.48, 328,208.22 and 69,057.42

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Solution

The fourth proportional to 218,805.48, 328,208.22 and 69,057.42 is: 103,586.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,805.48 : 328,208.22 = 69,057.42 : x
  2. Step 2: Convert to fraction form
    218,805.48/328,208.22 = 69,057.42/x
  3. Step 3: Cross multiply
    218,805.48x = 328,208.22 × 69,057.42
  4. Step 4: Simplify right side
    218,805.48x = 22,665,212,895.99
  5. Step 5: Solve for x
    x = 22,665,212,895.99/218,805.48
  6. Step 6: Final answer
    x = 103,586.13

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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.