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Finding the Fourth Proportional to 123,081.39, 185,007.51 and 81,230.45

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Solution

The fourth proportional to 123,081.39, 185,007.51 and 81,230.45 is: 122,100.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,081.39 : 185,007.51 = 81,230.45 : x
  2. Step 2: Convert to fraction form
    123,081.39/185,007.51 = 81,230.45/x
  3. Step 3: Cross multiply
    123,081.39x = 185,007.51 × 81,230.45
  4. Step 4: Simplify right side
    123,081.39x = 15,028,242,365.64
  5. Step 5: Solve for x
    x = 15,028,242,365.64/123,081.39
  6. Step 6: Final answer
    x = 122,100.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.