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Finding the Fourth Proportional to 123,665.40, 185,279.40 and 104,857.20

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Solution

The fourth proportional to 123,665.40, 185,279.40 and 104,857.20 is: 157,100.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,665.40 : 185,279.40 = 104,857.20 : x
  2. Step 2: Convert to fraction form
    123,665.40/185,279.40 = 104,857.20/x
  3. Step 3: Cross multiply
    123,665.40x = 185,279.40 × 104,857.20
  4. Step 4: Simplify right side
    123,665.40x = 19,427,879,101.68
  5. Step 5: Solve for x
    x = 19,427,879,101.68/123,665.40
  6. Step 6: Final answer
    x = 157,100.36

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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.