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Finding the Fourth Proportional to 53,705.60, 80,481.60 and 39,555.20

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Solution

The fourth proportional to 53,705.60, 80,481.60 and 39,555.20 is: 59,276.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,705.60 : 80,481.60 = 39,555.20 : x
  2. Step 2: Convert to fraction form
    53,705.60/80,481.60 = 39,555.20/x
  3. Step 3: Cross multiply
    53,705.60x = 80,481.60 × 39,555.20
  4. Step 4: Simplify right side
    53,705.60x = 3,183,465,784.32
  5. Step 5: Solve for x
    x = 3,183,465,784.32/53,705.60
  6. Step 6: Final answer
    x = 59,276.24

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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.