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Finding the Fourth Proportional to 72,782.70, 109,179.09 and 28,394.70

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Solution

The fourth proportional to 72,782.70, 109,179.09 and 28,394.70 is: 42,594.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,782.70 : 109,179.09 = 28,394.70 : x
  2. Step 2: Convert to fraction form
    72,782.70/109,179.09 = 28,394.70/x
  3. Step 3: Cross multiply
    72,782.70x = 109,179.09 × 28,394.70
  4. Step 4: Simplify right side
    72,782.70x = 3,100,107,506.82
  5. Step 5: Solve for x
    x = 3,100,107,506.82/72,782.70
  6. Step 6: Final answer
    x = 42,594.02

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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.