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Finding the Fourth Proportional to 201,680.70, 302,521.05 and 131,639.10

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Solution

The fourth proportional to 201,680.70, 302,521.05 and 131,639.10 is: 197,458.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,680.70 : 302,521.05 = 131,639.10 : x
  2. Step 2: Convert to fraction form
    201,680.70/302,521.05 = 131,639.10/x
  3. Step 3: Cross multiply
    201,680.70x = 302,521.05 × 131,639.10
  4. Step 4: Simplify right side
    201,680.70x = 39,823,598,753.06
  5. Step 5: Solve for x
    x = 39,823,598,753.06/201,680.70
  6. Step 6: Final answer
    x = 197,458.65

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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.