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Finding the Fourth Proportional to 52,880, 79,311.49 and 15,431.28

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Solution

The fourth proportional to 52,880, 79,311.49 and 15,431.28 is: 23,144.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,880 : 79,311.49 = 15,431.28 : x
  2. Step 2: Convert to fraction form
    52,880/79,311.49 = 15,431.28/x
  3. Step 3: Cross multiply
    52,880x = 79,311.49 × 15,431.28
  4. Step 4: Simplify right side
    52,880x = 1,223,877,809.41
  5. Step 5: Solve for x
    x = 1,223,877,809.41/52,880
  6. Step 6: Final answer
    x = 23,144.44

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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.