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Finding the Fourth Proportional to 67,381.70, 101,072.55 and 66,506.90

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Solution

The fourth proportional to 67,381.70, 101,072.55 and 66,506.90 is: 99,760.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,381.70 : 101,072.55 = 66,506.90 : x
  2. Step 2: Convert to fraction form
    67,381.70/101,072.55 = 66,506.90/x
  3. Step 3: Cross multiply
    67,381.70x = 101,072.55 × 66,506.90
  4. Step 4: Simplify right side
    67,381.70x = 6,722,021,975.60
  5. Step 5: Solve for x
    x = 6,722,021,975.60/67,381.70
  6. Step 6: Final answer
    x = 99,760.35

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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.