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Finding the Fourth Proportional to 43,361.85, 65,041.77 and 19,988.29

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Solution

The fourth proportional to 43,361.85, 65,041.77 and 19,988.29 is: 29,981.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,361.85 : 65,041.77 = 19,988.29 : x
  2. Step 2: Convert to fraction form
    43,361.85/65,041.77 = 19,988.29/x
  3. Step 3: Cross multiply
    43,361.85x = 65,041.77 × 19,988.29
  4. Step 4: Simplify right side
    43,361.85x = 1,300,073,760.87
  5. Step 5: Solve for x
    x = 1,300,073,760.87/43,361.85
  6. Step 6: Final answer
    x = 29,981.97

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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.