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Finding the Fourth Proportional to 66,818.56, 100,197.60 and 31,800.64

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Solution

The fourth proportional to 66,818.56, 100,197.60 and 31,800.64 is: 47,686.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,818.56 : 100,197.60 = 31,800.64 : x
  2. Step 2: Convert to fraction form
    66,818.56/100,197.60 = 31,800.64/x
  3. Step 3: Cross multiply
    66,818.56x = 100,197.60 × 31,800.64
  4. Step 4: Simplify right side
    66,818.56x = 3,186,347,806.46
  5. Step 5: Solve for x
    x = 3,186,347,806.46/66,818.56
  6. Step 6: Final answer
    x = 47,686.57

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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.