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Finding the Fourth Proportional to 71,403.64, 106,467.09 and 69,441.87

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Solution

The fourth proportional to 71,403.64, 106,467.09 and 69,441.87 is: 103,541.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,403.64 : 106,467.09 = 69,441.87 : x
  2. Step 2: Convert to fraction form
    71,403.64/106,467.09 = 69,441.87/x
  3. Step 3: Cross multiply
    71,403.64x = 106,467.09 × 69,441.87
  4. Step 4: Simplify right side
    71,403.64x = 7,393,273,915.62
  5. Step 5: Solve for x
    x = 7,393,273,915.62/71,403.64
  6. Step 6: Final answer
    x = 103,541.98

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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.