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Finding the Fourth Proportional to 100,387.95, 138,539.72 and 60,093.92

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Solution

The fourth proportional to 100,387.95, 138,539.72 and 60,093.92 is: 82,932.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,387.95 : 138,539.72 = 60,093.92 : x
  2. Step 2: Convert to fraction form
    100,387.95/138,539.72 = 60,093.92/x
  3. Step 3: Cross multiply
    100,387.95x = 138,539.72 × 60,093.92
  4. Step 4: Simplify right side
    100,387.95x = 8,325,393,857.33
  5. Step 5: Solve for x
    x = 8,325,393,857.33/100,387.95
  6. Step 6: Final answer
    x = 82,932.20

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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.