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Finding the Fourth Proportional to 85,796.88, 128,744.28 and 67,024.12

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Solution

The fourth proportional to 85,796.88, 128,744.28 and 67,024.12 is: 100,574.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,796.88 : 128,744.28 = 67,024.12 : x
  2. Step 2: Convert to fraction form
    85,796.88/128,744.28 = 67,024.12/x
  3. Step 3: Cross multiply
    85,796.88x = 128,744.28 × 67,024.12
  4. Step 4: Simplify right side
    85,796.88x = 8,628,972,072.03
  5. Step 5: Solve for x
    x = 8,628,972,072.03/85,796.88
  6. Step 6: Final answer
    x = 100,574.43

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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.