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Finding the Fourth Proportional to 215,681.76, 323,438.38 and 82,517.76

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Solution

The fourth proportional to 215,681.76, 323,438.38 and 82,517.76 is: 123,744.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,681.76 : 323,438.38 = 82,517.76 : x
  2. Step 2: Convert to fraction form
    215,681.76/323,438.38 = 82,517.76/x
  3. Step 3: Cross multiply
    215,681.76x = 323,438.38 × 82,517.76
  4. Step 4: Simplify right side
    215,681.76x = 26,689,410,615.63
  5. Step 5: Solve for x
    x = 26,689,410,615.63/215,681.76
  6. Step 6: Final answer
    x = 123,744.40

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1.5x scale

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.