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Finding the Fourth Proportional to 73,212.65, 109,846.31 and 28,870.32

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Solution

The fourth proportional to 73,212.65, 109,846.31 and 28,870.32 is: 43,316.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,212.65 : 109,846.31 = 28,870.32 : x
  2. Step 2: Convert to fraction form
    73,212.65/109,846.31 = 28,870.32/x
  3. Step 3: Cross multiply
    73,212.65x = 109,846.31 × 28,870.32
  4. Step 4: Simplify right side
    73,212.65x = 3,171,297,976.17
  5. Step 5: Solve for x
    x = 3,171,297,976.17/73,212.65
  6. Step 6: Final answer
    x = 43,316.26

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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.