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Finding the Fourth Proportional to 52,768.40, 79,123.80 and 21,568.40

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Solution

The fourth proportional to 52,768.40, 79,123.80 and 21,568.40 is: 32,340.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,768.40 : 79,123.80 = 21,568.40 : x
  2. Step 2: Convert to fraction form
    52,768.40/79,123.80 = 21,568.40/x
  3. Step 3: Cross multiply
    52,768.40x = 79,123.80 × 21,568.40
  4. Step 4: Simplify right side
    52,768.40x = 1,706,573,767.92
  5. Step 5: Solve for x
    x = 1,706,573,767.92/52,768.40
  6. Step 6: Final answer
    x = 32,340.83

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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.