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Finding the Fourth Proportional to 73,105.20, 109,657.80 and 49,485.60

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Solution

The fourth proportional to 73,105.20, 109,657.80 and 49,485.60 is: 74,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,105.20 : 109,657.80 = 49,485.60 : x
  2. Step 2: Convert to fraction form
    73,105.20/109,657.80 = 49,485.60/x
  3. Step 3: Cross multiply
    73,105.20x = 109,657.80 × 49,485.60
  4. Step 4: Simplify right side
    73,105.20x = 5,426,482,027.68
  5. Step 5: Solve for x
    x = 5,426,482,027.68/73,105.20
  6. Step 6: Final answer
    x = 74,228.40

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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.