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Finding the Fourth Proportional to 66,000, 91,121.16 and 45,850.08

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Solution

The fourth proportional to 66,000, 91,121.16 and 45,850.08 is: 63,301.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,000 : 91,121.16 = 45,850.08 : x
  2. Step 2: Convert to fraction form
    66,000/91,121.16 = 45,850.08/x
  3. Step 3: Cross multiply
    66,000x = 91,121.16 × 45,850.08
  4. Step 4: Simplify right side
    66,000x = 4,177,912,475.69
  5. Step 5: Solve for x
    x = 4,177,912,475.69/66,000
  6. Step 6: Final answer
    x = 63,301.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.