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Finding the Fourth Proportional to 215,615.74, 323,486.01 and 89,232.66

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Solution

The fourth proportional to 215,615.74, 323,486.01 and 89,232.66 is: 133,874.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,615.74 : 323,486.01 = 89,232.66 : x
  2. Step 2: Convert to fraction form
    215,615.74/323,486.01 = 89,232.66/x
  3. Step 3: Cross multiply
    215,615.74x = 323,486.01 × 89,232.66
  4. Step 4: Simplify right side
    215,615.74x = 28,865,515,527.66
  5. Step 5: Solve for x
    x = 28,865,515,527.66/215,615.74
  6. Step 6: Final answer
    x = 133,874.81

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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.