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Finding the Fourth Proportional to 66,817.74, 100,242.11 and 19,433.96

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Solution

The fourth proportional to 66,817.74, 100,242.11 and 19,433.96 is: 29,155.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,817.74 : 100,242.11 = 19,433.96 : x
  2. Step 2: Convert to fraction form
    66,817.74/100,242.11 = 19,433.96/x
  3. Step 3: Cross multiply
    66,817.74x = 100,242.11 × 19,433.96
  4. Step 4: Simplify right side
    66,817.74x = 1,948,101,156.06
  5. Step 5: Solve for x
    x = 1,948,101,156.06/66,817.74
  6. Step 6: Final answer
    x = 29,155.45

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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.