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Finding the Fourth Proportional to 123,074.35, 169,842.69 and 66,485.71

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Solution

The fourth proportional to 123,074.35, 169,842.69 and 66,485.71 is: 91,750.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,074.35 : 169,842.69 = 66,485.71 : x
  2. Step 2: Convert to fraction form
    123,074.35/169,842.69 = 66,485.71/x
  3. Step 3: Cross multiply
    123,074.35x = 169,842.69 × 66,485.71
  4. Step 4: Simplify right side
    123,074.35x = 11,292,111,832.96
  5. Step 5: Solve for x
    x = 11,292,111,832.96/123,074.35
  6. Step 6: Final answer
    x = 91,750.33

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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.