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Finding the Fourth Proportional to 40,489.60, 60,748.80 and 39,049.60

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Solution

The fourth proportional to 40,489.60, 60,748.80 and 39,049.60 is: 58,588.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,489.60 : 60,748.80 = 39,049.60 : x
  2. Step 2: Convert to fraction form
    40,489.60/60,748.80 = 39,049.60/x
  3. Step 3: Cross multiply
    40,489.60x = 60,748.80 × 39,049.60
  4. Step 4: Simplify right side
    40,489.60x = 2,372,216,340.48
  5. Step 5: Solve for x
    x = 2,372,216,340.48/40,489.60
  6. Step 6: Final answer
    x = 58,588.29

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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.