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Finding the Fourth Proportional to 79,953.26, 119,915.45 and 20,785.28

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Solution

The fourth proportional to 79,953.26, 119,915.45 and 20,785.28 is: 31,174.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,953.26 : 119,915.45 = 20,785.28 : x
  2. Step 2: Convert to fraction form
    79,953.26/119,915.45 = 20,785.28/x
  3. Step 3: Cross multiply
    79,953.26x = 119,915.45 × 20,785.28
  4. Step 4: Simplify right side
    79,953.26x = 2,492,476,400.44
  5. Step 5: Solve for x
    x = 2,492,476,400.44/79,953.26
  6. Step 6: Final answer
    x = 31,174.17

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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.