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Finding the Fourth Proportional to 117,186, 161,716.60 and 63,471

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Solution

The fourth proportional to 117,186, 161,716.60 and 63,471 is: 87,589.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,186 : 161,716.60 = 63,471 : x
  2. Step 2: Convert to fraction form
    117,186/161,716.60 = 63,471/x
  3. Step 3: Cross multiply
    117,186x = 161,716.60 × 63,471
  4. Step 4: Simplify right side
    117,186x = 10,264,314,318.60
  5. Step 5: Solve for x
    x = 10,264,314,318.60/117,186
  6. Step 6: Final answer
    x = 87,589.94

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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.