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Finding the Fourth Proportional to 66,620.78, 100,002.27 and 28,688.81

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Solution

The fourth proportional to 66,620.78, 100,002.27 and 28,688.81 is: 43,063.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,620.78 : 100,002.27 = 28,688.81 : x
  2. Step 2: Convert to fraction form
    66,620.78/100,002.27 = 28,688.81/x
  3. Step 3: Cross multiply
    66,620.78x = 100,002.27 × 28,688.81
  4. Step 4: Simplify right side
    66,620.78x = 2,868,946,123.60
  5. Step 5: Solve for x
    x = 2,868,946,123.60/66,620.78
  6. Step 6: Final answer
    x = 43,063.83

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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.