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Finding the Fourth Proportional to 72,867.60, 109,252.80 and 33,404.40

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Solution

The fourth proportional to 72,867.60, 109,252.80 and 33,404.40 is: 50,084.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,867.60 : 109,252.80 = 33,404.40 : x
  2. Step 2: Convert to fraction form
    72,867.60/109,252.80 = 33,404.40/x
  3. Step 3: Cross multiply
    72,867.60x = 109,252.80 × 33,404.40
  4. Step 4: Simplify right side
    72,867.60x = 3,649,524,232.32
  5. Step 5: Solve for x
    x = 3,649,524,232.32/72,867.60
  6. Step 6: Final answer
    x = 50,084.32

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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.