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Finding the Fourth Proportional to 73,448.64, 109,905.12 and 67,872.96

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Solution

The fourth proportional to 73,448.64, 109,905.12 and 67,872.96 is: 101,561.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,448.64 : 109,905.12 = 67,872.96 : x
  2. Step 2: Convert to fraction form
    73,448.64/109,905.12 = 67,872.96/x
  3. Step 3: Cross multiply
    73,448.64x = 109,905.12 × 67,872.96
  4. Step 4: Simplify right side
    73,448.64x = 7,459,585,813.56
  5. Step 5: Solve for x
    x = 7,459,585,813.56/73,448.64
  6. Step 6: Final answer
    x = 101,561.93

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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.