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Finding the Fourth Proportional to 73,008.64, 109,524.78 and 28,611.32

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Solution

The fourth proportional to 73,008.64, 109,524.78 and 28,611.32 is: 42,921.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,008.64 : 109,524.78 = 28,611.32 : x
  2. Step 2: Convert to fraction form
    73,008.64/109,524.78 = 28,611.32/x
  3. Step 3: Cross multiply
    73,008.64x = 109,524.78 × 28,611.32
  4. Step 4: Simplify right side
    73,008.64x = 3,133,648,528.51
  5. Step 5: Solve for x
    x = 3,133,648,528.51/73,008.64
  6. Step 6: Final answer
    x = 42,921.61

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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.