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Finding the Fourth Proportional to 74,986.80, 112,523.40 and 28,273.20

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Solution

The fourth proportional to 74,986.80, 112,523.40 and 28,273.20 is: 42,426.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,986.80 : 112,523.40 = 28,273.20 : x
  2. Step 2: Convert to fraction form
    74,986.80/112,523.40 = 28,273.20/x
  3. Step 3: Cross multiply
    74,986.80x = 112,523.40 × 28,273.20
  4. Step 4: Simplify right side
    74,986.80x = 3,181,396,592.88
  5. Step 5: Solve for x
    x = 3,181,396,592.88/74,986.80
  6. Step 6: Final answer
    x = 42,426.09

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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.