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Finding the Fourth Proportional to 123,109.51, 169,891.17 and 66,520.88

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Solution

The fourth proportional to 123,109.51, 169,891.17 and 66,520.88 is: 91,798.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,109.51 : 169,891.17 = 66,520.88 : x
  2. Step 2: Convert to fraction form
    123,109.51/169,891.17 = 66,520.88/x
  3. Step 3: Cross multiply
    123,109.51x = 169,891.17 × 66,520.88
  4. Step 4: Simplify right side
    123,109.51x = 11,301,310,307.90
  5. Step 5: Solve for x
    x = 11,301,310,307.90/123,109.51
  6. Step 6: Final answer
    x = 91,798.84

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1.5x scale

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.