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Finding the Fourth Proportional to 71,321.10, 106,866.45 and 44,978.70

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Solution

The fourth proportional to 71,321.10, 106,866.45 and 44,978.70 is: 67,395.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,321.10 : 106,866.45 = 44,978.70 : x
  2. Step 2: Convert to fraction form
    71,321.10/106,866.45 = 44,978.70/x
  3. Step 3: Cross multiply
    71,321.10x = 106,866.45 × 44,978.70
  4. Step 4: Simplify right side
    71,321.10x = 4,806,713,994.62
  5. Step 5: Solve for x
    x = 4,806,713,994.62/71,321.10
  6. Step 6: Final answer
    x = 67,395.40

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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.