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Finding the Fourth Proportional to 117,286.80, 175,930.20 and 28,539.60

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Solution

The fourth proportional to 117,286.80, 175,930.20 and 28,539.60 is: 42,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,286.80 : 175,930.20 = 28,539.60 : x
  2. Step 2: Convert to fraction form
    117,286.80/175,930.20 = 28,539.60/x
  3. Step 3: Cross multiply
    117,286.80x = 175,930.20 × 28,539.60
  4. Step 4: Simplify right side
    117,286.80x = 5,020,977,535.92
  5. Step 5: Solve for x
    x = 5,020,977,535.92/117,286.80
  6. Step 6: Final answer
    x = 42,809.40

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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.