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Finding the Fourth Proportional to 73,121.46, 109,837.53 and 68,855.42

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Solution

The fourth proportional to 73,121.46, 109,837.53 and 68,855.42 is: 103,429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,121.46 : 109,837.53 = 68,855.42 : x
  2. Step 2: Convert to fraction form
    73,121.46/109,837.53 = 68,855.42/x
  3. Step 3: Cross multiply
    73,121.46x = 109,837.53 × 68,855.42
  4. Step 4: Simplify right side
    73,121.46x = 7,562,908,710.72
  5. Step 5: Solve for x
    x = 7,562,908,710.72/73,121.46
  6. Step 6: Final answer
    x = 103,429.40

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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.