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Finding the Fourth Proportional to 218,805.83, 328,179.57 and 61,021.07

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Solution

The fourth proportional to 218,805.83, 328,179.57 and 61,021.07 is: 91,523.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,805.83 : 328,179.57 = 61,021.07 : x
  2. Step 2: Convert to fraction form
    218,805.83/328,179.57 = 61,021.07/x
  3. Step 3: Cross multiply
    218,805.83x = 328,179.57 × 61,021.07
  4. Step 4: Simplify right side
    218,805.83x = 20,025,866,872.64
  5. Step 5: Solve for x
    x = 20,025,866,872.64/218,805.83
  6. Step 6: Final answer
    x = 91,523.46

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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.