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Finding the Fourth Proportional to 235,056, 324,377.28 and 129,072

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Solution

The fourth proportional to 235,056, 324,377.28 and 129,072 is: 178,119.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,056 : 324,377.28 = 129,072 : x
  2. Step 2: Convert to fraction form
    235,056/324,377.28 = 129,072/x
  3. Step 3: Cross multiply
    235,056x = 324,377.28 × 129,072
  4. Step 4: Simplify right side
    235,056x = 41,868,024,284.16
  5. Step 5: Solve for x
    x = 41,868,024,284.16/235,056
  6. Step 6: Final answer
    x = 178,119.36

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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.