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Finding the Fourth Proportional to 123,314.64, 170,174.19 and 66,726

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Solution

The fourth proportional to 123,314.64, 170,174.19 and 66,726 is: 92,081.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,314.64 : 170,174.19 = 66,726 : x
  2. Step 2: Convert to fraction form
    123,314.64/170,174.19 = 66,726/x
  3. Step 3: Cross multiply
    123,314.64x = 170,174.19 × 66,726
  4. Step 4: Simplify right side
    123,314.64x = 11,355,043,001.94
  5. Step 5: Solve for x
    x = 11,355,043,001.94/123,314.64
  6. Step 6: Final answer
    x = 92,081.87

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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.