Home / 231,356.51-319,269.75-129,380.81

Finding the Fourth Proportional to 231,356.51, 319,269.75 and 129,380.81

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Solution

The fourth proportional to 231,356.51, 319,269.75 and 129,380.81 is: 178,544.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,356.51 : 319,269.75 = 129,380.81 : x
  2. Step 2: Convert to fraction form
    231,356.51/319,269.75 = 129,380.81/x
  3. Step 3: Cross multiply
    231,356.51x = 319,269.75 × 129,380.81
  4. Step 4: Simplify right side
    231,356.51x = 41,307,378,863.50
  5. Step 5: Solve for x
    x = 41,307,378,863.50/231,356.51
  6. Step 6: Final answer
    x = 178,544.27

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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.