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Finding the Fourth Proportional to 218,743.33, 328,142.33 and 85,606.37

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Solution

The fourth proportional to 218,743.33, 328,142.33 and 85,606.37 is: 128,420.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,743.33 : 328,142.33 = 85,606.37 : x
  2. Step 2: Convert to fraction form
    218,743.33/328,142.33 = 85,606.37/x
  3. Step 3: Cross multiply
    218,743.33x = 328,142.33 × 85,606.37
  4. Step 4: Simplify right side
    218,743.33x = 28,091,073,286.61
  5. Step 5: Solve for x
    x = 28,091,073,286.61/218,743.33
  6. Step 6: Final answer
    x = 128,420.25

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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.