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Finding the Fourth Proportional to 235,046.40, 352,720.80 and 129,940.80

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Solution

The fourth proportional to 235,046.40, 352,720.80 and 129,940.80 is: 194,994.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,046.40 : 352,720.80 = 129,940.80 : x
  2. Step 2: Convert to fraction form
    235,046.40/352,720.80 = 129,940.80/x
  3. Step 3: Cross multiply
    235,046.40x = 352,720.80 × 129,940.80
  4. Step 4: Simplify right side
    235,046.40x = 45,832,822,928.64
  5. Step 5: Solve for x
    x = 45,832,822,928.64/235,046.40
  6. Step 6: Final answer
    x = 194,994.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.