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Finding the Fourth Proportional to 115,261.56, 171,990.87 and 91,297.56

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Solution

The fourth proportional to 115,261.56, 171,990.87 and 91,297.56 is: 136,232.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,261.56 : 171,990.87 = 91,297.56 : x
  2. Step 2: Convert to fraction form
    115,261.56/171,990.87 = 91,297.56/x
  3. Step 3: Cross multiply
    115,261.56x = 171,990.87 × 91,297.56
  4. Step 4: Simplify right side
    115,261.56x = 15,702,346,773.28
  5. Step 5: Solve for x
    x = 15,702,346,773.28/115,261.56
  6. Step 6: Final answer
    x = 136,232.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.