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Finding the Fourth Proportional to 66,661.72, 99,942.78 and 40,360.12

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Solution

The fourth proportional to 66,661.72, 99,942.78 and 40,360.12 is: 60,510.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,661.72 : 99,942.78 = 40,360.12 : x
  2. Step 2: Convert to fraction form
    66,661.72/99,942.78 = 40,360.12/x
  3. Step 3: Cross multiply
    66,661.72x = 99,942.78 × 40,360.12
  4. Step 4: Simplify right side
    66,661.72x = 4,033,702,593.93
  5. Step 5: Solve for x
    x = 4,033,702,593.93/66,661.72
  6. Step 6: Final answer
    x = 60,510.03

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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.