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Finding the Fourth Proportional to 71,078.90, 106,617.82 and 28,949.08

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Solution

The fourth proportional to 71,078.90, 106,617.82 and 28,949.08 is: 43,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,078.90 : 106,617.82 = 28,949.08 : x
  2. Step 2: Convert to fraction form
    71,078.90/106,617.82 = 28,949.08/x
  3. Step 3: Cross multiply
    71,078.90x = 106,617.82 × 28,949.08
  4. Step 4: Simplify right side
    71,078.90x = 3,086,487,800.61
  5. Step 5: Solve for x
    x = 3,086,487,800.61/71,078.90
  6. Step 6: Final answer
    x = 43,423.40

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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.