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Finding the Fourth Proportional to 39,979, 55,175.88 and 23,212

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Solution

The fourth proportional to 39,979, 55,175.88 and 23,212 is: 32,035.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,979 : 55,175.88 = 23,212 : x
  2. Step 2: Convert to fraction form
    39,979/55,175.88 = 23,212/x
  3. Step 3: Cross multiply
    39,979x = 55,175.88 × 23,212
  4. Step 4: Simplify right side
    39,979x = 1,280,742,526.56
  5. Step 5: Solve for x
    x = 1,280,742,526.56/39,979
  6. Step 6: Final answer
    x = 32,035.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.