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Finding the Fourth Proportional to 73,928.88, 102,021.78 and 40,394.88

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Solution

The fourth proportional to 73,928.88, 102,021.78 and 40,394.88 is: 55,744.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,928.88 : 102,021.78 = 40,394.88 : x
  2. Step 2: Convert to fraction form
    73,928.88/102,021.78 = 40,394.88/x
  3. Step 3: Cross multiply
    73,928.88x = 102,021.78 × 40,394.88
  4. Step 4: Simplify right side
    73,928.88x = 4,121,157,560.49
  5. Step 5: Solve for x
    x = 4,121,157,560.49/73,928.88
  6. Step 6: Final answer
    x = 55,744.89

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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.