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Finding the Fourth Proportional to 215,642.96, 323,513.68 and 65,904.56

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Solution

The fourth proportional to 215,642.96, 323,513.68 and 65,904.56 is: 98,871.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,642.96 : 323,513.68 = 65,904.56 : x
  2. Step 2: Convert to fraction form
    215,642.96/323,513.68 = 65,904.56/x
  3. Step 3: Cross multiply
    215,642.96x = 323,513.68 × 65,904.56
  4. Step 4: Simplify right side
    215,642.96x = 21,321,026,734.38
  5. Step 5: Solve for x
    x = 21,321,026,734.38/215,642.96
  6. Step 6: Final answer
    x = 98,871.89

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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.