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Finding the Fourth Proportional to 218,054.70, 326,839.05 and 84,890.70

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Solution

The fourth proportional to 218,054.70, 326,839.05 and 84,890.70 is: 127,241.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,054.70 : 326,839.05 = 84,890.70 : x
  2. Step 2: Convert to fraction form
    218,054.70/326,839.05 = 84,890.70/x
  3. Step 3: Cross multiply
    218,054.70x = 326,839.05 × 84,890.70
  4. Step 4: Simplify right side
    218,054.70x = 27,745,595,741.84
  5. Step 5: Solve for x
    x = 27,745,595,741.84/218,054.70
  6. Step 6: Final answer
    x = 127,241.45

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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.