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Finding the Fourth Proportional to 67,388.52, 101,070.62 and 18,129

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Solution

The fourth proportional to 67,388.52, 101,070.62 and 18,129 is: 27,190.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,388.52 : 101,070.62 = 18,129 : x
  2. Step 2: Convert to fraction form
    67,388.52/101,070.62 = 18,129/x
  3. Step 3: Cross multiply
    67,388.52x = 101,070.62 × 18,129
  4. Step 4: Simplify right side
    67,388.52x = 1,832,309,269.98
  5. Step 5: Solve for x
    x = 1,832,309,269.98/67,388.52
  6. Step 6: Final answer
    x = 27,190.23

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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.