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Finding the Fourth Proportional to 85,754.56, 128,637.48 and 23,425

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Solution

The fourth proportional to 85,754.56, 128,637.48 and 23,425 is: 35,139.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,754.56 : 128,637.48 = 23,425 : x
  2. Step 2: Convert to fraction form
    85,754.56/128,637.48 = 23,425/x
  3. Step 3: Cross multiply
    85,754.56x = 128,637.48 × 23,425
  4. Step 4: Simplify right side
    85,754.56x = 3,013,332,969
  5. Step 5: Solve for x
    x = 3,013,332,969/85,754.56
  6. Step 6: Final answer
    x = 35,139.04

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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.