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Finding the Fourth Proportional to 57,908.64, 86,889.60 and 40,166.40

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Solution

The fourth proportional to 57,908.64, 86,889.60 and 40,166.40 is: 60,268.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,908.64 : 86,889.60 = 40,166.40 : x
  2. Step 2: Convert to fraction form
    57,908.64/86,889.60 = 40,166.40/x
  3. Step 3: Cross multiply
    57,908.64x = 86,889.60 × 40,166.40
  4. Step 4: Simplify right side
    57,908.64x = 3,490,042,429.44
  5. Step 5: Solve for x
    x = 3,490,042,429.44/57,908.64
  6. Step 6: Final answer
    x = 60,268.08

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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.