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Finding the Fourth Proportional to 66,609.76, 99,912.33 and 16,690.28

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Solution

The fourth proportional to 66,609.76, 99,912.33 and 16,690.28 is: 25,034.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,609.76 : 99,912.33 = 16,690.28 : x
  2. Step 2: Convert to fraction form
    66,609.76/99,912.33 = 16,690.28/x
  3. Step 3: Cross multiply
    66,609.76x = 99,912.33 × 16,690.28
  4. Step 4: Simplify right side
    66,609.76x = 1,667,564,763.15
  5. Step 5: Solve for x
    x = 1,667,564,763.15/66,609.76
  6. Step 6: Final answer
    x = 25,034.84

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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.