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Finding the Fourth Proportional to 115,857.80, 173,786.70 and 66,091.40

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Solution

The fourth proportional to 115,857.80, 173,786.70 and 66,091.40 is: 99,137.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,857.80 : 173,786.70 = 66,091.40 : x
  2. Step 2: Convert to fraction form
    115,857.80/173,786.70 = 66,091.40/x
  3. Step 3: Cross multiply
    115,857.80x = 173,786.70 × 66,091.40
  4. Step 4: Simplify right side
    115,857.80x = 11,485,806,304.38
  5. Step 5: Solve for x
    x = 11,485,806,304.38/115,857.80
  6. Step 6: Final answer
    x = 99,137.10

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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.