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Finding the Fourth Proportional to 218,801.61, 328,173.25 and 61,016.85

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Solution

The fourth proportional to 218,801.61, 328,173.25 and 61,016.85 is: 91,517.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,801.61 : 328,173.25 = 61,016.85 : x
  2. Step 2: Convert to fraction form
    218,801.61/328,173.25 = 61,016.85/x
  3. Step 3: Cross multiply
    218,801.61x = 328,173.25 × 61,016.85
  4. Step 4: Simplify right side
    218,801.61x = 20,024,097,816.72
  5. Step 5: Solve for x
    x = 20,024,097,816.72/218,801.61
  6. Step 6: Final answer
    x = 91,517.14

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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.