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Finding the Fourth Proportional to 71,994.34, 108,015.81 and 45,360.32

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Solution

The fourth proportional to 71,994.34, 108,015.81 and 45,360.32 is: 68,055.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994.34 : 108,015.81 = 45,360.32 : x
  2. Step 2: Convert to fraction form
    71,994.34/108,015.81 = 45,360.32/x
  3. Step 3: Cross multiply
    71,994.34x = 108,015.81 × 45,360.32
  4. Step 4: Simplify right side
    71,994.34x = 4,899,631,479.86
  5. Step 5: Solve for x
    x = 4,899,631,479.86/71,994.34
  6. Step 6: Final answer
    x = 68,055.79

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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.