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Finding the Fourth Proportional to 71,361.20, 107,041.80 and 43,713.20

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Solution

The fourth proportional to 71,361.20, 107,041.80 and 43,713.20 is: 65,569.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,361.20 : 107,041.80 = 43,713.20 : x
  2. Step 2: Convert to fraction form
    71,361.20/107,041.80 = 43,713.20/x
  3. Step 3: Cross multiply
    71,361.20x = 107,041.80 × 43,713.20
  4. Step 4: Simplify right side
    71,361.20x = 4,679,139,611.76
  5. Step 5: Solve for x
    x = 4,679,139,611.76/71,361.20
  6. Step 6: Final answer
    x = 65,569.80

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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.