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Finding the Fourth Proportional to 215,357.45, 323,082.34 and 65,609.81

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Solution

The fourth proportional to 215,357.45, 323,082.34 and 65,609.81 is: 98,428.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,357.45 : 323,082.34 = 65,609.81 : x
  2. Step 2: Convert to fraction form
    215,357.45/323,082.34 = 65,609.81/x
  3. Step 3: Cross multiply
    215,357.45x = 323,082.34 × 65,609.81
  4. Step 4: Simplify right side
    215,357.45x = 21,197,372,191.22
  5. Step 5: Solve for x
    x = 21,197,372,191.22/215,357.45
  6. Step 6: Final answer
    x = 98,428.78

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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.