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Finding the Fourth Proportional to 123,159.21, 169,959.77 and 66,570.59

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Solution

The fourth proportional to 123,159.21, 169,959.77 and 66,570.59 is: 91,867.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,159.21 : 169,959.77 = 66,570.59 : x
  2. Step 2: Convert to fraction form
    123,159.21/169,959.77 = 66,570.59/x
  3. Step 3: Cross multiply
    123,159.21x = 169,959.77 × 66,570.59
  4. Step 4: Simplify right side
    123,159.21x = 11,314,320,982.51
  5. Step 5: Solve for x
    x = 11,314,320,982.51/123,159.21
  6. Step 6: Final answer
    x = 91,867.44

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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.