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Finding the Fourth Proportional to 123,110.51, 169,892.55 and 66,521.88

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Solution

The fourth proportional to 123,110.51, 169,892.55 and 66,521.88 is: 91,800.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,110.51 : 169,892.55 = 66,521.88 : x
  2. Step 2: Convert to fraction form
    123,110.51/169,892.55 = 66,521.88/x
  3. Step 3: Cross multiply
    123,110.51x = 169,892.55 × 66,521.88
  4. Step 4: Simplify right side
    123,110.51x = 11,301,571,823.99
  5. Step 5: Solve for x
    x = 11,301,571,823.99/123,110.51
  6. Step 6: Final answer
    x = 91,800.22

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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.