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Finding the Fourth Proportional to 123,091.72, 169,866.66 and 66,503.08

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Solution

The fourth proportional to 123,091.72, 169,866.66 and 66,503.08 is: 91,774.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,091.72 : 169,866.66 = 66,503.08 : x
  2. Step 2: Convert to fraction form
    123,091.72/169,866.66 = 66,503.08/x
  3. Step 3: Cross multiply
    123,091.72x = 169,866.66 × 66,503.08
  4. Step 4: Simplify right side
    123,091.72x = 11,296,656,079.31
  5. Step 5: Solve for x
    x = 11,296,656,079.31/123,091.72
  6. Step 6: Final answer
    x = 91,774.30

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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.