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Finding the Fourth Proportional to 71,356.60, 106,905.30 and 43,622.20

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Solution

The fourth proportional to 71,356.60, 106,905.30 and 43,622.20 is: 65,354.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,356.60 : 106,905.30 = 43,622.20 : x
  2. Step 2: Convert to fraction form
    71,356.60/106,905.30 = 43,622.20/x
  3. Step 3: Cross multiply
    71,356.60x = 106,905.30 × 43,622.20
  4. Step 4: Simplify right side
    71,356.60x = 4,663,444,377.66
  5. Step 5: Solve for x
    x = 4,663,444,377.66/71,356.60
  6. Step 6: Final answer
    x = 65,354.07

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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.