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Finding the Fourth Proportional to 71,756.84, 107,639.28 and 21,838.56

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Solution

The fourth proportional to 71,756.84, 107,639.28 and 21,838.56 is: 32,759.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,756.84 : 107,639.28 = 21,838.56 : x
  2. Step 2: Convert to fraction form
    71,756.84/107,639.28 = 21,838.56/x
  3. Step 3: Cross multiply
    71,756.84x = 107,639.28 × 21,838.56
  4. Step 4: Simplify right side
    71,756.84x = 2,350,686,874.64
  5. Step 5: Solve for x
    x = 2,350,686,874.64/71,756.84
  6. Step 6: Final answer
    x = 32,759.06

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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.