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Finding the Fourth Proportional to 71,915.40, 107,873.68 and 21,996.42

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Solution

The fourth proportional to 71,915.40, 107,873.68 and 21,996.42 is: 32,994.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,915.40 : 107,873.68 = 21,996.42 : x
  2. Step 2: Convert to fraction form
    71,915.40/107,873.68 = 21,996.42/x
  3. Step 3: Cross multiply
    71,915.40x = 107,873.68 × 21,996.42
  4. Step 4: Simplify right side
    71,915.40x = 2,372,834,772.23
  5. Step 5: Solve for x
    x = 2,372,834,772.23/71,915.40
  6. Step 6: Final answer
    x = 32,994.81

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1.5x scale

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.