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Finding the Fourth Proportional to 43,649.60, 65,474.40 and 38,811.20

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Solution

The fourth proportional to 43,649.60, 65,474.40 and 38,811.20 is: 58,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,649.60 : 65,474.40 = 38,811.20 : x
  2. Step 2: Convert to fraction form
    43,649.60/65,474.40 = 38,811.20/x
  3. Step 3: Cross multiply
    43,649.60x = 65,474.40 × 38,811.20
  4. Step 4: Simplify right side
    43,649.60x = 2,541,140,033.28
  5. Step 5: Solve for x
    x = 2,541,140,033.28/43,649.60
  6. Step 6: Final answer
    x = 58,216.80

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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.