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Finding the Fourth Proportional to 215,680.76, 323,436.88 and 82,516.76

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Solution

The fourth proportional to 215,680.76, 323,436.88 and 82,516.76 is: 123,742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,680.76 : 323,436.88 = 82,516.76 : x
  2. Step 2: Convert to fraction form
    215,680.76/323,436.88 = 82,516.76/x
  3. Step 3: Cross multiply
    215,680.76x = 323,436.88 × 82,516.76
  4. Step 4: Simplify right side
    215,680.76x = 26,688,963,402.11
  5. Step 5: Solve for x
    x = 26,688,963,402.11/215,680.76
  6. Step 6: Final answer
    x = 123,742.90

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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.