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Finding the Fourth Proportional to 137,092.08, 189,131.40 and 89,328

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Solution

The fourth proportional to 137,092.08, 189,131.40 and 89,328 is: 123,236.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,092.08 : 189,131.40 = 89,328 : x
  2. Step 2: Convert to fraction form
    137,092.08/189,131.40 = 89,328/x
  3. Step 3: Cross multiply
    137,092.08x = 189,131.40 × 89,328
  4. Step 4: Simplify right side
    137,092.08x = 16,894,729,699.20
  5. Step 5: Solve for x
    x = 16,894,729,699.20/137,092.08
  6. Step 6: Final answer
    x = 123,236.37

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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.