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Finding the Fourth Proportional to 123,203.09, 170,019.81 and 69,487.77

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Solution

The fourth proportional to 123,203.09, 170,019.81 and 69,487.77 is: 95,892.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,203.09 : 170,019.81 = 69,487.77 : x
  2. Step 2: Convert to fraction form
    123,203.09/170,019.81 = 69,487.77/x
  3. Step 3: Cross multiply
    123,203.09x = 170,019.81 × 69,487.77
  4. Step 4: Simplify right side
    123,203.09x = 11,814,298,090.30
  5. Step 5: Solve for x
    x = 11,814,298,090.30/123,203.09
  6. Step 6: Final answer
    x = 95,892.87

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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.