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Finding the Fourth Proportional to 235,272, 324,675.36 and 129,288

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Solution

The fourth proportional to 235,272, 324,675.36 and 129,288 is: 178,417.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,272 : 324,675.36 = 129,288 : x
  2. Step 2: Convert to fraction form
    235,272/324,675.36 = 129,288/x
  3. Step 3: Cross multiply
    235,272x = 324,675.36 × 129,288
  4. Step 4: Simplify right side
    235,272x = 41,976,627,943.68
  5. Step 5: Solve for x
    x = 41,976,627,943.68/235,272
  6. Step 6: Final answer
    x = 178,417.44

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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.