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Finding the Fourth Proportional to 73,287.42, 109,935.72 and 20,700.96

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Solution

The fourth proportional to 73,287.42, 109,935.72 and 20,700.96 is: 31,052.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,287.42 : 109,935.72 = 20,700.96 : x
  2. Step 2: Convert to fraction form
    73,287.42/109,935.72 = 20,700.96/x
  3. Step 3: Cross multiply
    73,287.42x = 109,935.72 × 20,700.96
  4. Step 4: Simplify right side
    73,287.42x = 2,275,774,942.29
  5. Step 5: Solve for x
    x = 2,275,774,942.29/73,287.42
  6. Step 6: Final answer
    x = 31,052.74

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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.