Home / 123,135.36-169,848-85,395.84

Finding the Fourth Proportional to 123,135.36, 169,848 and 85,395.84

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Solution

The fourth proportional to 123,135.36, 169,848 and 85,395.84 is: 117,791.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,135.36 : 169,848 = 85,395.84 : x
  2. Step 2: Convert to fraction form
    123,135.36/169,848 = 85,395.84/x
  3. Step 3: Cross multiply
    123,135.36x = 169,848 × 85,395.84
  4. Step 4: Simplify right side
    123,135.36x = 14,504,312,632.32
  5. Step 5: Solve for x
    x = 14,504,312,632.32/123,135.36
  6. Step 6: Final answer
    x = 117,791.61

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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.