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Finding the Fourth Proportional to 72,208.20, 108,353.70 and 38,928.12

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Solution

The fourth proportional to 72,208.20, 108,353.70 and 38,928.12 is: 58,414.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,208.20 : 108,353.70 = 38,928.12 : x
  2. Step 2: Convert to fraction form
    72,208.20/108,353.70 = 38,928.12/x
  3. Step 3: Cross multiply
    72,208.20x = 108,353.70 × 38,928.12
  4. Step 4: Simplify right side
    72,208.20x = 4,218,005,836.04
  5. Step 5: Solve for x
    x = 4,218,005,836.04/72,208.20
  6. Step 6: Final answer
    x = 58,414.50

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1.5x scale

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.