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Finding the Fourth Proportional to 72,932.88, 100,647.46 and 39,398.88

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Solution

The fourth proportional to 72,932.88, 100,647.46 and 39,398.88 is: 54,370.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,932.88 : 100,647.46 = 39,398.88 : x
  2. Step 2: Convert to fraction form
    72,932.88/100,647.46 = 39,398.88/x
  3. Step 3: Cross multiply
    72,932.88x = 100,647.46 × 39,398.88
  4. Step 4: Simplify right side
    72,932.88x = 3,965,397,198.84
  5. Step 5: Solve for x
    x = 3,965,397,198.84/72,932.88
  6. Step 6: Final answer
    x = 54,370.50

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1.5x scale

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.