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Finding the Fourth Proportional to 136,642.59, 203,605.48 and 121,736.97

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Solution

The fourth proportional to 136,642.59, 203,605.48 and 121,736.97 is: 181,395.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,642.59 : 203,605.48 = 121,736.97 : x
  2. Step 2: Convert to fraction form
    136,642.59/203,605.48 = 121,736.97/x
  3. Step 3: Cross multiply
    136,642.59x = 203,605.48 × 121,736.97
  4. Step 4: Simplify right side
    136,642.59x = 24,786,314,210.60
  5. Step 5: Solve for x
    x = 24,786,314,210.60/136,642.59
  6. Step 6: Final answer
    x = 181,395.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.