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Finding the Fourth Proportional to 118,481.60, 177,722.40 and 105,579.20

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Solution

The fourth proportional to 118,481.60, 177,722.40 and 105,579.20 is: 158,368.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,481.60 : 177,722.40 = 105,579.20 : x
  2. Step 2: Convert to fraction form
    118,481.60/177,722.40 = 105,579.20/x
  3. Step 3: Cross multiply
    118,481.60x = 177,722.40 × 105,579.20
  4. Step 4: Simplify right side
    118,481.60x = 18,763,788,814.08
  5. Step 5: Solve for x
    x = 18,763,788,814.08/118,481.60
  6. Step 6: Final answer
    x = 158,368.80

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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.