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Finding the Fourth Proportional to 43,612.80, 65,419.20 and 15,907.20

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Solution

The fourth proportional to 43,612.80, 65,419.20 and 15,907.20 is: 23,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,612.80 : 65,419.20 = 15,907.20 : x
  2. Step 2: Convert to fraction form
    43,612.80/65,419.20 = 15,907.20/x
  3. Step 3: Cross multiply
    43,612.80x = 65,419.20 × 15,907.20
  4. Step 4: Simplify right side
    43,612.80x = 1,040,636,298.24
  5. Step 5: Solve for x
    x = 1,040,636,298.24/43,612.80
  6. Step 6: Final answer
    x = 23,860.80

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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.