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Finding the Fourth Proportional to 235,609, 325,140.42 and 129,625

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Solution

The fourth proportional to 235,609, 325,140.42 and 129,625 is: 178,882.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,609 : 325,140.42 = 129,625 : x
  2. Step 2: Convert to fraction form
    235,609/325,140.42 = 129,625/x
  3. Step 3: Cross multiply
    235,609x = 325,140.42 × 129,625
  4. Step 4: Simplify right side
    235,609x = 42,146,326,942.50
  5. Step 5: Solve for x
    x = 42,146,326,942.50/235,609
  6. Step 6: Final answer
    x = 178,882.50

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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.