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Finding the Fourth Proportional to 66,721.29, 100,121.46 and 24,630.72

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Solution

The fourth proportional to 66,721.29, 100,121.46 and 24,630.72 is: 36,960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,721.29 : 100,121.46 = 24,630.72 : x
  2. Step 2: Convert to fraction form
    66,721.29/100,121.46 = 24,630.72/x
  3. Step 3: Cross multiply
    66,721.29x = 100,121.46 × 24,630.72
  4. Step 4: Simplify right side
    66,721.29x = 2,466,063,647.25
  5. Step 5: Solve for x
    x = 2,466,063,647.25/66,721.29
  6. Step 6: Final answer
    x = 36,960.67

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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.