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Finding the Fourth Proportional to 67,211.76, 100,840.32 and 29,766.72

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Solution

The fourth proportional to 67,211.76, 100,840.32 and 29,766.72 is: 44,660.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,211.76 : 100,840.32 = 29,766.72 : x
  2. Step 2: Convert to fraction form
    67,211.76/100,840.32 = 29,766.72/x
  3. Step 3: Cross multiply
    67,211.76x = 100,840.32 × 29,766.72
  4. Step 4: Simplify right side
    67,211.76x = 3,001,685,570.15
  5. Step 5: Solve for x
    x = 3,001,685,570.15/67,211.76
  6. Step 6: Final answer
    x = 44,660.12

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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.