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Finding the Fourth Proportional to 71,128.26, 106,044.12 and 69,310.62

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Solution

The fourth proportional to 71,128.26, 106,044.12 and 69,310.62 is: 103,334.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.26 : 106,044.12 = 69,310.62 : x
  2. Step 2: Convert to fraction form
    71,128.26/106,044.12 = 69,310.62/x
  3. Step 3: Cross multiply
    71,128.26x = 106,044.12 × 69,310.62
  4. Step 4: Simplify right side
    71,128.26x = 7,349,983,704.55
  5. Step 5: Solve for x
    x = 7,349,983,704.55/71,128.26
  6. Step 6: Final answer
    x = 103,334.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.