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Finding the Fourth Proportional to 43,772.80, 65,679.70 and 21,574.08

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Solution

The fourth proportional to 43,772.80, 65,679.70 and 21,574.08 is: 32,371.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,772.80 : 65,679.70 = 21,574.08 : x
  2. Step 2: Convert to fraction form
    43,772.80/65,679.70 = 21,574.08/x
  3. Step 3: Cross multiply
    43,772.80x = 65,679.70 × 21,574.08
  4. Step 4: Simplify right side
    43,772.80x = 1,416,978,773.78
  5. Step 5: Solve for x
    x = 1,416,978,773.78/43,772.80
  6. Step 6: Final answer
    x = 32,371.22

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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.