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Finding the Fourth Proportional to 81,369.70, 122,007.76 and 43,372.16

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Solution

The fourth proportional to 81,369.70, 122,007.76 and 43,372.16 is: 65,033.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,369.70 : 122,007.76 = 43,372.16 : x
  2. Step 2: Convert to fraction form
    81,369.70/122,007.76 = 43,372.16/x
  3. Step 3: Cross multiply
    81,369.70x = 122,007.76 × 43,372.16
  4. Step 4: Simplify right side
    81,369.70x = 5,291,740,087.96
  5. Step 5: Solve for x
    x = 5,291,740,087.96/81,369.70
  6. Step 6: Final answer
    x = 65,033.30

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1.5x scale

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.