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Finding the Fourth Proportional to 73,105.10, 109,657.65 and 60,639.20

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Solution

The fourth proportional to 73,105.10, 109,657.65 and 60,639.20 is: 90,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,105.10 : 109,657.65 = 60,639.20 : x
  2. Step 2: Convert to fraction form
    73,105.10/109,657.65 = 60,639.20/x
  3. Step 3: Cross multiply
    73,105.10x = 109,657.65 × 60,639.20
  4. Step 4: Simplify right side
    73,105.10x = 6,649,552,169.88
  5. Step 5: Solve for x
    x = 6,649,552,169.88/73,105.10
  6. Step 6: Final answer
    x = 90,958.80

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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.