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Finding the Fourth Proportional to 215,266.40, 322,861.20 and 136,239.20

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Solution

The fourth proportional to 215,266.40, 322,861.20 and 136,239.20 is: 204,334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,266.40 : 322,861.20 = 136,239.20 : x
  2. Step 2: Convert to fraction form
    215,266.40/322,861.20 = 136,239.20/x
  3. Step 3: Cross multiply
    215,266.40x = 322,861.20 × 136,239.20
  4. Step 4: Simplify right side
    215,266.40x = 43,986,351,599.04
  5. Step 5: Solve for x
    x = 43,986,351,599.04/215,266.40
  6. Step 6: Final answer
    x = 204,334.50

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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.