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Finding the Fourth Proportional to 43,820.80, 65,731.20 and 19,244.80

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Solution

The fourth proportional to 43,820.80, 65,731.20 and 19,244.80 is: 28,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,820.80 : 65,731.20 = 19,244.80 : x
  2. Step 2: Convert to fraction form
    43,820.80/65,731.20 = 19,244.80/x
  3. Step 3: Cross multiply
    43,820.80x = 65,731.20 × 19,244.80
  4. Step 4: Simplify right side
    43,820.80x = 1,264,983,797.76
  5. Step 5: Solve for x
    x = 1,264,983,797.76/43,820.80
  6. Step 6: Final answer
    x = 28,867.20

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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.