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Finding the Fourth Proportional to 218,052.40, 326,819.40 and 91,692.40

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Solution

The fourth proportional to 218,052.40, 326,819.40 and 91,692.40 is: 137,429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,052.40 : 326,819.40 = 91,692.40 : x
  2. Step 2: Convert to fraction form
    218,052.40/326,819.40 = 91,692.40/x
  3. Step 3: Cross multiply
    218,052.40x = 326,819.40 × 91,692.40
  4. Step 4: Simplify right side
    218,052.40x = 29,966,855,152.56
  5. Step 5: Solve for x
    x = 29,966,855,152.56/218,052.40
  6. Step 6: Final answer
    x = 137,429.60

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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.