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Finding the Fourth Proportional to 70,873.70, 106,310.66 and 66,543.44

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Solution

The fourth proportional to 70,873.70, 106,310.66 and 66,543.44 is: 99,815.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,873.70 : 106,310.66 = 66,543.44 : x
  2. Step 2: Convert to fraction form
    70,873.70/106,310.66 = 66,543.44/x
  3. Step 3: Cross multiply
    70,873.70x = 106,310.66 × 66,543.44
  4. Step 4: Simplify right side
    70,873.70x = 7,074,276,160.80
  5. Step 5: Solve for x
    x = 7,074,276,160.80/70,873.70
  6. Step 6: Final answer
    x = 99,815.26

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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.