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Finding the Fourth Proportional to 85,409.73, 117,863.40 and 47,168.51

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Solution

The fourth proportional to 85,409.73, 117,863.40 and 47,168.51 is: 65,091.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,409.73 : 117,863.40 = 47,168.51 : x
  2. Step 2: Convert to fraction form
    85,409.73/117,863.40 = 47,168.51/x
  3. Step 3: Cross multiply
    85,409.73x = 117,863.40 × 47,168.51
  4. Step 4: Simplify right side
    85,409.73x = 5,559,440,961.53
  5. Step 5: Solve for x
    x = 5,559,440,961.53/85,409.73
  6. Step 6: Final answer
    x = 65,091.43

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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.